Colorado counties

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Main article: State of Colorado
See also: List of counties in Colorado and List of United States counties and county-equivalents

The U.S state of Colorado is divided into 64 counties. Counties are important units of government in Colorado since the state has no secondary civil subdivisions, such as townships. Two of these counties, the City and County of Denver and the City and County of Broomfield, have consolidated city and county governments.

Contents

Table [edit]

An enlargeable map of the 64 counties of the state of Colorado

The following sortable table lists the 64 counties of the state of Colorado with the following information:

  1. The official name of the county,[1]
  2. The International Committee for Information Technology Standards (INCITS) county code.[2]
  3. The date the county was established,[3]
  4. The county seat,[4]
  5. The rank among the 64 counties of Colorado by population as of July 1, 2012, as estimated by the United States Census Bureau,[2]
  6. The county population as of July 1, 2012, as estimated by the United States Census Bureau,[2]
  7. The county population as of April 1, 2010, as enumerated by the 2010 United States Census,[2]
  8. The percent population change from April 1, 2010, to July 1, 2012,[2]
  9. A link to a detailed transportation map of the county.[5]
  10. The average population density per land area of the county as of July 1, 2012,[2]
  11. The land area of the county,[2]
  12. The water area of the county,[2]
  13. The total area of the county,[2]
  14. The maximum surface elevation in the county,[6][7][8]
  15. The minimum surface elevation in the county,[9][8][10]
  16. The reference latitude of the county,[2] and
  17. The reference longitude of the county.[2]
The 64 Counties of the State of Colorado
County INCITS Date Established County Seat Pop Rank 2012 Pop 2010 Census Pop Change Map Pop Density Land Area Water Area Total Area Max Elev Min Elev Latitude Longitude
Adams County 08001 1902-11-15 Brighton !000005 !B9869618925266 459,598 !B9870018334325 441,603 !D0032003173468 +4.07% map 0006!393.6 mi-2 
152.0 km-2		 0039!1,167.653 mi2 
3,024.208 km2		 0008!16.243 mi2 
42.070 km2		 0039!1,183.897 mi2 
3,066.278 km2		 0050!5,668 ft 
1728 m		 0044!4,432 ft 
1351 m		 39.87° N 104.33° W
Alamosa County 08003 1913-03-08 Alamosa !000029 !B9903104485180 16,148 !B9903549593946 15,445 !D0030896837135 +4.55% map 0022!21.4 mi-2 
8.3 km-2		 0053!722.643 mi2 
1,871.637 km2		 0058!0.698 mi2 
1.808 km2		 0053!723.341 mi2 
1,873.445 km2		 0003!14,351 ft 
4374 m		 0010!6,387 ft 
1947 m		 37.57° N 105.79° W
Arapahoe County 08005 1861-11-01 Littleton !000003 !B9867027660891 595,546 !B9867431004848 572,003 !D0031903156997 +4.12% map 0003!716.7 mi-2 
276.7 km-2		 0048!798.100 mi2 
2,067.070 km2		 0022!7.337 mi2 
19.004 km2		 0048!805.438 mi2 
2,086.074 km2		 0046!6,218 ft 
1895 m		 0033!4,730 ft 
1442 m		 39.64° N 104.33° W
Archuleta County 08007 1885-04-14 Pagosa Springs !000036 !B9906015216859 12,070 !B9906003624574 12,084 !H9932394197871 −0.12% map 0034!8.9 mi-2 
3.5 km-2		 0033!1,350.175 mi2 
3,496.938 km2		 0032!5.339 mi2 
13.828 km2		 0033!1,355.514 mi2 
3,510.765 km2		 0026!13,308 ft 
4056 m		 0014!6,085 ft 
1855 m		 37.20° N 107.05° W
Baca County 08009 1889-04-16 Springfield !000055 !B9917702222499 3,751 !B9917604065456 3,788 !H9953713244583 −0.98% map 0059!1.5 mi-2 
0.6 km-2		 0011!2,554.967 mi2 
6,617.334 km2		 0041!2.372 mi2 
6.142 km2		 0011!2,557.338 mi2 
6,623.476 km2		 0053!5,293 ft 
1613 m		 0061!3,458 ft 
1054 m		 37.30° N 102.54° W
Bent County 08011 1870-02-11 Las Animas !000047 !B9913390528449 5,773 !B9912205964021 6,499 !H9978081464169 −11.17% map 0046!4.3 mi-2 
1.7 km-2		 0032!1,512.861 mi2 
3,918.292 km2		 0003!28.222 mi2 
73.094 km2		 0031!1,541.083 mi2 
3,991.386 km2		 0059!4,857 ft 
1481 m		 0057!3,671 ft 
1119 m		 37.93° N 103.08° W
Boulder County 08013 1861-11-01 Boulder !000007 !B9873708908646 305,318 !B9874067382395 294,567 !D0033105077079 +3.65% map 0005!405.6 mi-2 
156.6 km-2		 0052!726.289 mi2 
1,881.080 km2		 0009!14.081 mi2 
36.469 km2		 0051!740.370 mi2 
1,917.549 km2		 0013!14,259 ft 
4346 m		 0034!4,717 ft 
1438 m		 40.09° N 105.40° W
City and County of Broomfield 08014 2001-11-15 Broomfield !000012 !B9890266769335 58,298 !B9890688771401 55,889 !D0031441558572 +4.31% map 0002!1,691.9 mi-2 
653.2 km-2		 0064!33.034 mi2 
85.558 km2		 0060!0.566 mi2 
1.466 km2		 0064!33.600 mi2 
87.024 km2		 0048!5,848 ft 
1783 m		 0036!4,691 ft 
1430 m		 39.95° N 105.05° W
Chaffee County 08015 1879-02-10 Salida !000027 !B9901935741603 18,150 !B9902125407735 17,809 !D0039555767491 +1.91% map 0027!17.6 mi-2 
6.8 km-2		 0043!1,013.403 mi2 
2,624.702 km2		 0050!1.550 mi2 
4.013 km2		 0043!1,014.953 mi2 
2,628.716 km2		 0002!14,427 ft 
4397 m		 0020!5,298 ft 
1615 m		 38.74° N 106.32° W
Cheyenne County 08017 1889-03-25 Cheyenne Wells !000059 !B9924641695372 1,874 !B9924846554288 1,836 !D0038777584114 +2.07% map 0060!1.0 mi-2 
0.4 km-2		 0024!1,778.276 mi2 
4,605.713 km2		 0036!3.153 mi2 
8.166 km2		 0025!1,781.429 mi2 
4,613.879 km2		 0055!5,257 ft 
1602 m		 0055!3,740 ft 
1140 m		 38.84° N 102.60° W
Clear Creek County 08019 1861-11-01 Georgetown !000039 !B9908921354196 9,026 !B9908852898590 9,088 !H9950124242440 −0.68% map 0020!23.0 mi-2 
8.9 km-2		 0059!395.227 mi2 
1,023.633 km2		 0053!1.266 mi2 
3.280 km2		 0059!396.493 mi2 
1,026.913 km2		 0011!14,278 ft 
4352 m		 0023!5,075 ft 
1547 m		 39.69° N 105.67° W
Conejos County 08021 1861-11-07 Conejos !000040 !B9909790057997 8,275 !B9909813045122 8,256 !D0060742565085 +0.23% map 0041!6.4 mi-2 
2.5 km-2		 0034!1,287.391 mi2 
3,334.326 km2		 0034!3.566 mi2 
9.235 km2		 0035!1,290.956 mi2 
3,343.561 km2		 0030!13,179 ft 
4017 m		 0006!7,404 ft 
2257 m		 37.21° N 106.18° W
Costilla County 08023 1861-11-01 San Luis !000056 !B9918129789326 3,594 !B9918326480129 3,524 !D0039188567450 +1.99% map 0052!2.9 mi-2 
1.1 km-2		 0038!1,226.952 mi2 
3,177.790 km2		 0035!3.409 mi2 
8.829 km2		 0038!1,230.360 mi2 
3,186.619 km2		 0004!14,351 ft 
4374 m		 0007!7,375 ft 
2248 m		 37.28° N 105.43° W
Crowley County 08025 1911-05-29 Ordway !000050 !B9914123483449 5,365 !B9913304291281 5,823 !H9974572983122 −7.87% map 0038!7.4 mi-2 
2.9 km-2		 0049!787.421 mi2 
2,039.411 km2		 0011!12.908 mi2 
33.430 km2		 0049!800.329 mi2 
2,072.842 km2		 0056!5,228 ft 
1593 m		 0050!3,966 ft 
1209 m		 38.32° N 103.79° W
Custer County 08027 1877-03-09 Westcliffe !000054 !B9916455610598 4,249 !B9916441499589 4,255 !H9934359094282 −0.14% map 0042!5.8 mi-2 
2.2 km-2		 0051!738.625 mi2 
1,913.031 km2		 0052!1.299 mi2 
3.365 km2		 0052!739.925 mi2 
1,916.396 km2		 0015!14,246 ft 
4342 m		 0041!4,547 ft 
1386 m		 38.10° N 105.37° W
Delta County 08029 1883-02-11 Delta !000018 !B9896767500346 30,432 !B9896598071036 30,952 !H9959136359151 −1.68% map 0019!27.1 mi-2 
10.5 km-2		 0040!1,142.050 mi2 
2,957.897 km2		 0026!6.549 mi2 
16.961 km2		 0040!1,148.599 mi2 
2,974.858 km2		 0040!11,396 ft 
3474 m		 0032!4,763 ft 
1452 m		 38.86° N 107.86° W
City and County of Denver 08031 1902-11-15 Denver !000002 !B9866397778728 634,265 !B9866950517671 600,158 !D0028676903120 +5.68% map 0001!3,922.6 mi-2 
1,514.5 km-2		 0062!153.000 mi2 
396.269 km2		 0049!1.631 mi2 
4.225 km2		 0062!154.632 mi2 
400.494 km2		 0049!5,688 ft 
1734 m		 0031!4,803 ft 
1464 m		 39.76° N 104.88° W
Dolores County 08033 1881-03-04 Dove Creek !000058 !B9924021020494 1,994 !B9923675988733 2,064 !H9966160941154 −3.39% map 0055!1.9 mi-2 
0.7 km-2		 0042!1,067.051 mi2 
2,763.650 km2		 0054!1.049 mi2 
2.716 km2		 0042!1,068.100 mi2 
2,766.366 km2		 0014!14,252 ft 
4344 m		 0029!4,911 ft 
1497 m		 37.75° N 108.53° W
Douglas County 08035 1861-11-01 Castle Rock !000008 !B9873944300181 298,215 !B9874381252913 285,465 !D0031085881580 +4.47% map 0007!339.7 mi-2 
131.2 km-2		 0047!840.248 mi2 
2,176.232 km2		 0039!2.621 mi2 
6.789 km2		 0047!842.869 mi2 
2,183.022 km2		 0043!9,836 ft 
2998 m		 0021!5,242 ft 
1598 m		 39.33° N 104.93° W
Eagle County 08037 1883-02-11 Eagle !000015 !B9891434270197 51,874 !B9891372196990 52,197 !H9949148720222 −0.62% map 0016!31.0 mi-2 
12.0 km-2		 0027!1,684.530 mi2 
4,362.912 km2		 0023!7.261 mi2 
18.806 km2		 0027!1,691.791 mi2 
4,381.718 km2		 0020!14,011 ft 
4271 m		 0013!6,220 ft 
1896 m		 39.63° N 106.69° W
Elbert County 08039 1874-02-02 Kiowa !000023 !B9899402354584 23,383 !B9899530183478 23,086 !D0043532495133 +1.29% map 0031!12.5 mi-2 
4.8 km-2		 0021!1,850.847 mi2 
4,793.671 km2		 0063!0.171 mi2 
0.442 km2		 0022!1,851.018 mi2 
4,794.113 km2		 0044!7,374 ft 
2248 m		 0038!4,580 ft 
1396 m		 39.31° N 104.12° W
El Paso County 08041 1861-11-01 Colorado Springs !000001 !B9866230502197 644,964 !B9866588818880 622,263 !D0033109538565 +3.65% map 0008!292.6 mi-2 
113.0 km-2		 0019!2,126.801 mi2 
5,508.390 km2		 0037!2.746 mi2 
7.112 km2		 0019!2,129.547 mi2 
5,515.501 km2		 0017!14,115 ft 
4302 m		 0025!5,055 ft 
1541 m		 38.83° N 104.53° W
Fremont County 08043 1861-11-01 Cañon City !000016 !B9892466179612 46,788 !B9892458488290 46,824 !H9928293677674 −0.08% map 0017!30.5 mi-2 
11.8 km-2		 0031!1,533.068 mi2 
3,970.627 km2		 0056!0.863 mi2 
2.235 km2		 0032!1,533.931 mi2 
3,972.863 km2		 0031!13,110 ft 
3996 m		 0039!4,573 ft 
1394 m		 38.46° N 105.42° W
Garfield County 08045 1883-02-10 Glenwood Springs !000013 !B9890500183547 56,953 !B9890599706169 56,389 !D0046049751315 +1.00% map 0024!19.1 mi-2 
7.4 km-2		 0008!2,947.563 mi2 
7,634.154 km2		 0018!8.274 mi2 
21.431 km2		 0008!2,955.838 mi2 
7,655.584 km2		 0034!12,361 ft 
3768 m		 0042!4,471 ft 
1363 m		 39.60° N 107.91° W
Gilpin County 08047 1861-11-01 Central City !000048 !B9913891343327 5,491 !B9913982818535 5,441 !D0046896951410 +0.92% map 0015!36.3 mi-2 
14.0 km-2		 0063!149.896 mi2 
388.229 km2		 0062!0.364 mi2 
0.942 km2		 0063!150.260 mi2 
389.171 km2		 0027!13,300 ft 
4054 m		 0028!4,983 ft 
1519 m		 39.86° N 105.53° W
Grand County 08049 1874-02-02 Hot Sulphur Springs !000033 !B9904393549310 14,195 !B9903947163473 14,843 !H9968686070437 −4.37% map 0036!8.0 mi-2 
3.1 km-2		 0022!1,846.330 mi2 
4,781.972 km2		 0004!23.263 mi2 
60.250 km2		 0021!1,869.592 mi2 
4,842.222 km2		 0025!13,559 ft 
4133 m		 0015!6,040 ft 
1841 m		 40.12° N 106.10° W
Gunnison County 08051 1877-03-09 Gunnison !000031 !B9903530189024 15,475 !B9903628244941 15,324 !D0046198956690 +0.99% map 0044!4.7 mi-2 
1.8 km-2		 0005!3,239.099 mi2 
8,389.229 km2		 0005!20.530 mi2 
53.172 km2		 0005!3,259.629 mi2 
8,442.401 km2		 0009!14,279 ft 
4352 m		 0009!7,178 ft 
2188 m		 38.67° N 107.08° W
Hinsdale County 08053 1874-02-10 Lake City !000062 !B9933029657523 810 !B9932630330419 843 !H9967595406034 −3.91% map 0064!0.8 mi-2 
0.3 km-2		 0041!1,117.251 mi2 
2,893.668 km2		 0030!5.917 mi2 
15.325 km2		 0041!1,123.168 mi2 
2,908.992 km2		 0006!14,321 ft 
4365 m		 0008!7,299 ft 
2225 m		 37.81° N 107.38° W
Huerfano County 08055 1861-11-01 Walsenburg !000045 !B9912057813163 6,596 !B9911884967498 6,711 !H9959334288782 −1.71% map 0048!4.2 mi-2 
1.6 km-2		 0030!1,591.001 mi2 
4,120.673 km2		 0042!2.236 mi2 
5.792 km2		 0030!1,593.237 mi2 
4,126.465 km2		 0005!14,326 ft 
4366 m		 0043!4,445 ft 
1355 m		 37.69° N 104.96° W
Jackson County 08057 1909-05-05 Walden !000061 !B9927936227085 1,348 !B9927600674086 1,394 !H9965887088051 −3.30% map 0061!0.9 mi-2 
0.3 km-2		 0029!1,613.723 mi2 
4,179.523 km2		 0024!7.239 mi2 
18.750 km2		 0029!1,620.962 mi2 
4,198.273 km2		 0033!12,954 ft 
3948 m		 0030!4,865 ft 
1483 m		 40.66° N 106.33° W
Jefferson County 08059 1861-11-01 Golden !000004 !B9867908022612 545,358 !B9868108325447 534,543 !D0039004781168 +2.02% map 0004!699.5 mi-2 
270.1 km-2		 0050!764.208 mi2 
1,979.290 km2		 0016!9.825 mi2 
25.446 km2		 0050!774.033 mi2 
2,004.736 km2		 0038!11,589 ft 
3532 m		 0027!4,986 ft 
1520 m		 39.59° N 105.25° W
Kiowa County 08061 1889-04-11 Eads !000060 !B9927248276805 1,444 !B9927572020772 1,398 !D0034141565263 +3.29% map 0063!0.8 mi-2 
0.3 km-2		 0025!1,767.767 mi2 
4,578.496 km2		 0006!18.160 mi2 
47.033 km2		 0024!1,785.927 mi2 
4,625.529 km2		 0061!4,697 ft 
1432 m		 0056!3,687 ft 
1124 m		 38.39° N 102.76° W
Kit Carson County 08063 1889-04-11 Burlington !000041 !B9910011216745 8,094 !B9909796102119 8,270 !H9961500942070 −2.13% map 0049!3.8 mi-2 
1.5 km-2		 0018!2,160.822 mi2 
5,596.502 km2		 0055!0.869 mi2 
2.252 km2		 0018!2,161.691 mi2 
5,598.754 km2		 0052!5,297 ft 
1615 m		 0059!3,523 ft 
1074 m		 39.31° N 102.60° W
Lake County 08065 1861-11-01 Leadville !000043 !B9910991783950 7,338 !B9911030014472 7,310 !D0055647940425 +0.38% map 0023!19.4 mi-2 
7.5 km-2		 0061!376.911 mi2 
976.194 km2		 0025!6.998 mi2 
18.124 km2		 0061!383.909 mi2 
994.319 km2		 0001!14,440 ft 
4401 m		 0001!8,720 ft 
2658 m		 39.20° N 106.35° W
La Plata County 08067 1874-02-10 Durango !000014 !B9891333190459 52,401 !B9891538914203 51,334 !D0038735023283 +2.08% map 0018!30.3 mi-2 
11.7 km-2		 0026!1,692.078 mi2 
4,382.463 km2		 0020!7.629 mi2 
19.760 km2		 0026!1,699.708 mi2 
4,402.223 km2		 0018!14,093 ft 
4296 m		 0048!4,268 ft 
1301 m		 37.29° N 107.84° W
Larimer County 08069 1861-11-01 Fort Collins !000006 !B9873541026884 310,487 !B9873896963408 299,630 !D0033177383468 +3.62% map 0009!115.4 mi-2 
44.6 km-2		 0009!2,596.002 mi2 
6,723.613 km2		 0001!37.952 mi2 
98.295 km2		 0009!2,633.954 mi2 
6,821.909 km2		 0024!13,573 ft 
4137 m		 0040!4,557 ft 
1389 m		 40.66° N 105.48° W
Las Animas County 08071 1866-02-09 Trinidad !000032 !B9903878679252 14,945 !B9903509531861 15,507 !H9966824550360 −3.62% map 0050!3.2 mi-2 
1.3 km-2		 0001!4,772.671 mi2 
12,361.162 km2		 0038!2.676 mi2 
6.930 km2		 0001!4,775.347 mi2 
12,368.092 km2		 0023!13,631 ft 
4155 m		 0046!4,317 ft 
1316 m		 37.32° N 104.04° W
Lincoln County 08073 1889-04-11 Hugo !000049 !B9913960788050 5,453 !B9913935147011 5,467 !H9940325720307 −0.26% map 0053!2.1 mi-2 
0.8 km-2		 0010!2,577.626 mi2 
6,676.021 km2		 0017!8.796 mi2 
22.781 km2		 0010!2,586.422 mi2 
6,698.802 km2		 0047!5,973 ft 
1821 m		 0052!3,923 ft 
1196 m		 38.99° N 103.51° W
Logan County 08075 1887-02-25 Sterling !000025 !B9899729240732 22,631 !B9899694833993 22,709 !H9943261922260 −0.34% map 0032!12.4 mi-2 
4.8 km-2		 0023!1,838.546 mi2 
4,761.813 km2		 0027!6.318 mi2 
16.364 km2		 0023!1,844.864 mi2 
4,778.177 km2		 0057!4,947 ft 
1508 m		 0062!3,428 ft 
1045 m		 40.73° N 103.09° W
Mesa County 08077 1883-02-14 Grand Junction !000011 !B9880960600020 147,848 !B9881036982656 146,723 !D0048707634197 +0.77% map 0013!44.1 mi-2 
17.0 km-2		 0004!3,328.974 mi2 
8,622.003 km2		 0012!12.149 mi2 
31.467 km2		 0004!3,341.123 mi2 
8,653.470 km2		 0041!11,236 ft 
3425 m		 0045!4,337 ft 
1322 m		 39.02° N 108.46° W
Mineral County 08079 1893-03-27 Creede !000063 !B9934361444734 709 !B9934319220885 712 !H9945305343772 −0.42% map 0062!0.8 mi-2 
0.3 km-2		 0046!875.666 mi2 
2,267.966 km2		 0043!2.016 mi2 
5.222 km2		 0046!877.683 mi2 
2,273.188 km2		 0021!13,902 ft 
4237 m		 0003!7,549 ft 
2301 m		 37.65° N 106.93° W
Moffat County 08081 1911-02-27 Craig !000034 !B9905120278914 13,200 !B9904679385133 13,795 !H9968564999188 −4.31% map 0051!2.9 mi-2 
1.1 km-2		 0002!4,743.290 mi2 
12,285.065 km2		 0021!7.622 mi2 
19.742 km2		 0002!4,750.912 mi2 
12,304.807 km2		 0042!10,840 ft 
3304 m		 0026!4,993 ft 
1522 m		 40.57° N 108.20° W
Montezuma County 08083 1889-04-16 Cortez !000021 !B9898562758187 25,431 !B9898521946609 25,535 !H9944965855600 −0.41% map 0030!12.6 mi-2 
4.9 km-2		 0020!2,029.527 mi2 
5,256.451 km2		 0015!10.624 mi2 
27.517 km2		 0020!2,040.151 mi2 
5,283.968 km2		 0028!13,237 ft 
4035 m		 0037!4,639 ft 
1414 m		 37.34° N 108.60° W
Montrose County 08085 1883-02-11 Montrose !000017 !B9893854025665 40,725 !B9893719635037 41,276 !H9956836983129 −1.33% map 0025!18.4 mi-2 
7.1 km-2		 0016!2,240.695 mi2 
5,803.373 km2		 0046!1.901 mi2 
4.923 km2		 0016!2,242.596 mi2 
5,808.296 km2		 0039!11,453 ft 
3491 m		 0035!4,711 ft 
1436 m		 38.41° N 108.26° W
Morgan County 08087 1889-02-19 Fort Morgan !000019 !B9897433235728 28,472 !B9897543777017 28,159 !D0044994191077 +1.11% map 0021!22.0 mi-2 
8.5 km-2		 0036!1,280.433 mi2 
3,316.305 km2		 0010!13.310 mi2 
34.474 km2		 0034!1,293.743 mi2 
3,350.779 km2		 0058!4,937 ft 
1505 m		 0049!3,989 ft 
1216 m		 40.26° N 103.81° W
Otero County 08089 1889-03-25 La Junta !000026 !B9901638281547 18,698 !B9901567402730 18,831 !H9950470894012 −0.71% map 0028!14.9 mi-2 
5.8 km-2		 0037!1,261.961 mi2 
3,268.465 km2		 0019!7.742 mi2 
20.052 km2		 0037!1,269.704 mi2 
3,288.518 km2		 0054!5,273 ft 
1607 m		 0054!3,809 ft 
1161 m		 37.88° N 103.72° W
Ouray County 08091 1877-01-18 Ouray !000052 !B9915815227815 4,530 !B9916024916515 4,436 !D0038542135662 +2.12% map 0035!8.2 mi-2 
3.2 km-2		 0058!541.593 mi2 
1,402.719 km2		 0059!0.618 mi2 
1.600 km2		 0058!542.210 mi2 
1,404.318 km2		 0016!14,158 ft 
4315 m		 0011!6,315 ft 
1925 m		 38.15° N 107.77° W
Park County 08093 1861-11-01 Fairplay !000030 !B9903178451393 16,029 !B9903068631769 16,206 !H9954830129095 −1.09% map 0039!7.4 mi-2 
2.9 km-2		 0017!2,193.846 mi2 
5,682.034 km2		 0007!16.807 mi2 
43.531 km2		 0017!2,210.653 mi2 
5,725.565 km2		 0008!14,293 ft 
4357 m		 0017!5,826 ft 
1776 m		 39.12° N 105.72° W
Phillips County 08095 1889-03-27 Holyoke !000053 !B9916181684465 4,367 !B9916011399955 4,442 !H9959186281090 −1.69% map 0040!6.5 mi-2 
2.5 km-2		 0054!687.928 mi2 
1,781.725 km2		 0064!0.117 mi2 
0.302 km2		 0054!688.044 mi2 
1,782.027 km2		 0064!4,117 ft 
1255 m		 0058!3,582 ft 
1092 m		 40.59° N 102.35° W
Pitkin County 08097 1881-02-23 Aspen !000028 !B9902436792381 17,263 !B9902503631722 17,148 !D0050047046993 +0.67% map 0026!17.7 mi-2 
6.8 km-2		 0044!970.697 mi2 
2,514.094 km2		 0040!2.498 mi2 
6.469 km2		 0044!973.195 mi2 
2,520.564 km2		 0010!14,279 ft 
4352 m		 0018!5,695 ft 
1736 m		 39.22° N 106.92° W
Prowers County 08099 1889-04-11 Lamar !000035 !B9905754357388 12,389 !B9905624443773 12,551 !H9956500407125 −1.29% map 0037!7.7 mi-2 
3.0 km-2		 0028!1,638.394 mi2 
4,243.422 km2		 0029!5.928 mi2 
15.353 km2		 0028!1,644.322 mi2 
4,258.775 km2		 0060!4,713 ft 
1437 m		 0063!3,346 ft 
1020 m		 37.96° N 102.39° W
Pueblo County 08101 1861-11-01 Pueblo !000010 !B9880117600334 160,852 !B9880229443708 159,063 !D0044876435456 +1.12% map 0010!66.7 mi-2 
25.7 km-2		 0013!2,386.104 mi2 
6,179.981 km2		 0013!11.691 mi2 
30.280 km2		 0013!2,397.795 mi2 
6,210.261 km2		 0035!12,352 ft 
3765 m		 0047!4,291 ft 
1308 m		 38.17° N 104.49° W
Rio Blanco County 08103 1889-03-25 Meeker !000044 !B9911669746927 6,857 !B9911952247411 6,666 !D0035525018308 +2.87% map 0054!2.1 mi-2 
0.8 km-2		 0006!3,220.933 mi2 
8,342.179 km2		 0047!1.880 mi2 
4.868 km2		 0006!3,222.813 mi2 
8,347.047 km2		 0037!12,033 ft 
3668 m		 0024!5,062 ft 
1543 m		 39.97° N 108.20° W
Rio Grande County 08105 1874-02-10 Del Norte !000037 !B9906120993883 11,943 !B9906088391973 11,982 !H9942724008434 −0.33% map 0029!13.1 mi-2 
5.1 km-2		 0045!911.958 mi2 
2,361.960 km2		 0061!0.380 mi2 
0.984 km2		 0045!912.338 mi2 
2,362.944 km2		 0029!13,209 ft 
4026 m		 0004!7,467 ft 
2276 m		 37.49° N 106.45° W
Routt County 08107 1877-01-29 Steamboat Springs !000024 !B9899423331966 23,334 !B9899348613944 23,509 !H9950996473683 −0.74% map 0033!10.0 mi-2 
3.8 km-2		 0015!2,362.026 mi2 
6,117.619 km2		 0028!6.110 mi2 
15.826 km2		 0015!2,368.136 mi2 
6,133.445 km2		 0036!12,185 ft 
3714 m		 0012!6,266 ft 
1910 m		 40.48° N 106.99° W
Saguache County[11][12] 08109 1866-12-29 Saguache !000046 !B9912510603684 6,304 !B9912826453336 6,108 !D0034392400071 +3.21% map 0056!1.9 mi-2 
0.7 km-2		 0007!3,168.524 mi2 
8,206.441 km2		 0048!1.720 mi2 
4.455 km2		 0007!3,170.244 mi2 
8,210.895 km2		 0007!14,300 ft 
4359 m		 0016!6,013 ft 
1833 m		 38.03° N 106.25° W
San Juan County 08111 1876-01-31 Silverton !000064 !B9934633084024 690 !B9934503492577 699 !H9956475738351 −1.29% map 0058!1.8 mi-2 
0.7 km-2		 0060!387.488 mi2 
1,003.588 km2		 0057!0.786 mi2 
2.036 km2		 0060!388.274 mi2 
1,005.624 km2		 0022!13,900 ft 
4237 m		 0002!7,683 ft 
2342 m		 37.78° N 107.67° W
San Miguel County 08113 1883-03-02 Telluride !000042 !B9910667315213 7,580 !B9910963206670 7,359 !D0035055166314 +3.00% map 0043!5.7 mi-2 
2.2 km-2		 0035!1,286.611 mi2 
3,332.308 km2		 0044!2.013 mi2 
5.214 km2		 0036!1,288.625 mi2 
3,337.522 km2		 0019!14,023 ft 
4274 m		 0019!5,308 ft 
1618 m		 38.01° N 108.43° W
Sedgwick County 08115 1889-04-09 Julesburg !000057 !B9922238845229 2,383 !B9922255644896 2,379 !D0063881411491 +0.17% map 0045!4.3 mi-2 
1.7 km-2		 0057!548.041 mi2 
1,419.419 km2		 0051!1.363 mi2 
3.531 km2		 0057!549.404 mi2 
1,422.950 km2		 0063!4,127 ft 
1258 m		 0060!3,477 ft 
1060 m		 40.87° N 102.36° W
Summit County 08117 1861-11-01 Breckenridge !000020 !B9897584700156 28,044 !B9897602545195 27,994 !D0063277224750 +0.18% map 0012!46.0 mi-2 
17.8 km-2		 0055!608.358 mi2 
1,575.639 km2		 0014!10.920 mi2 
28.283 km2		 0055!619.278 mi2 
1,603.922 km2		 0012!14,278 ft 
4352 m		 0005!7,460 ft 
2274 m		 39.62° N 106.14° W
Teller County 08119 1899-03-23 Cripple Creek !000022 !B9899399788946 23,389 !B9899416477369 23,350 !D0063947906169 +0.17% map 0014!41.9 mi-2 
16.2 km-2		 0056!557.055 mi2 
1,442.767 km2		 0045!1.909 mi2 
4.945 km2		 0056!558.965 mi2 
1,447.712 km2		 0032!13,065 ft 
3982 m		 0022!5,236 ft 
1596 m		 38.87° N 105.18° W
Washington County 08121 1887-02-09 Akron !000051 !B9915307373423 4,766 !B9915207163816 4,814 !H9953919173925 −1.00% map 0057!1.9 mi-2 
0.7 km-2		 0012!2,518.031 mi2 
6,521.670 km2		 0031!5.872 mi2 
15.207 km2		 0012!2,523.903 mi2 
6,536.878 km2		 0051!5,433 ft 
1656 m		 0053!3,910 ft 
1192 m		 39.97° N 103.21° W
Weld County 08123 1861-11-01 Greeley !000009 !B9875174667579 263,691 !B9875595471712 252,825 !D0031470589016 +4.30% map 0011!63.4 mi-2 
24.5 km-2		 0003!3,987.238 mi2 
10,326.899 km2		 0002!29.558 mi2 
76.554 km2		 0003!4,016.796 mi2 
10,403.453 km2		 0045!6,388 ft 
1947 m		 0051!3,959 ft 
1207 m		 40.56° N 104.38° W
Yuma County 08125 1889-03-15 Wray !000038 !B9907778298762 10,119 !B9907853688466 10,043 !D0048838978131 +0.76% map 0047!4.2 mi-2 
1.6 km-2		 0014!2,364.405 mi2 
6,123.780 km2		 0033!4.299 mi2 
11.135 km2		 0014!2,368.704 mi2 
6,134.915 km2		 0062!4,447 ft 
1355 m		 0064!3,317 ft 
1011 m		 40.00° N 102.42° W
State of Colorado 08 1876-08-01 Denver !B9845382217493 5,187,582 !B9845692293116 5,029,196 !D0034579803177 +3.15% map 0099!48.5 mi-2 
18.7 km-2		 103,641.884 mi2 
268,431.246 km2		 451.779 mi2 
1,170.101 km2		 104,093.662 mi2 
269,601.348 km2		 14,440 ft 
4401 m		 3,317 ft 
1011 m		 38.99° N 105.51° W

Historic counties [edit]

The sortable table below lists all the historic counties of the Territory of New Mexico, the Territory of Utah, the Territory of Kansas, and the extralegal Territory of Jefferson[13] that previously existed within the boundaries of the present State of Colorado, as well as the three defunct counties of the Territory of Colorado and the three defunct counties of the State of Colorado. The table includes the following information:

  1. The official name of the county,
  2. The territory or state,
  3. The date the county was created,
  4. The date the county was abolished or excluded from the new Territory of Colorado, and
  5. Historical notes.
Counties formerly within the area of the State of Colorado
County Territory or State Created Superseded History
Taos County Territory of New Mexico 185201091852-01-09 186102281861-02-28 Originally one of the seven partidos of the Spanish, and later Mexican, province of Santa Fe de Nuevo México. One of the nine original counties created by the Territory of New Mexico in 1852. Excluded from the new Territory of Colorado in 1861.
Great Salt Lake County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, and excluded from the new Territory of Colorado in 1861.
Green River County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, but never organized. Dissolved in 1857, but recreated in 1859. Excluded from the new Territory of Colorado in 1861, and the Territory of Wyoming in 1868. Finally dissolved in 1872.
Iron County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, and excluded from the new Territory of Colorado in 1861.
Sanpete County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, and excluded from the new Territory of Colorado in 1861.
Utah County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, and excluded from the new Territory of Colorado in 1861.
Washington County Territory of Utah 185203031852-03-03 186102281861-02-28 Created in 1852, and excluded from the new Territory of Colorado in 1861.
Arapahoe County Territory of Kansas 185508251855-08-25 186101291861-01-29 Created in 1855, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Beaver County Territory of Utah 185601051856-01-05 186102281861-02-28 Split from Iron and Millard counties in 1856. Excluded from the new Territory of Colorado in 1861.
Broderick County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
El Paso County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Fremont County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Montana County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Oro County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Peketon County Territory of Kansas 185902071859-02-07 186101291861-01-29 Created in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Arrappahoe County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Cheyenne County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
El Paso County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Fountain County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Heele County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jackson County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jefferson County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Mountain County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
North County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Park County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Saint Vrain CountySt. Vrain County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Saratoga County Territory of Jefferson 185911281859-11-28 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Mora County Territory of New Mexico 186002011860-02-01 186102281861-02-28 Split from Taos County and San Miguel County in 1860. Excluded from the new Territory of Colorado in 1861.
Guadalupe County Territory of Colorado 186111011861-11-01 186111071861-11-07 One of the 17 original counties created by the Territory of Colorado in 1861. The county was renamed Conejos County after only six days.
Greenwood County Territory of Colorado 187002111870-02-11 187402061874-02-06 Created from former Cheyenne and Arapaho tribal land and the eastern portion of Huerfano County in 1870. The county was abolished in 1874 and its territory split between Elbert County and Bent County.
Platte County Territory of Colorado 187202091872-02-09 187402091874-02-09 Created from the eastern portion of Weld County in 1872. The county was abolished in 1874 after organizers failed to secure voter approval. The territory of the county was returned to Weld County.
Carbonate County State of Colorado 187902081879-02-08 187902101879-02-10 Lake County was renamed Carbonate County in 1879. Only two days later, Carbonate County was split into the new Chaffee County and a recreated Lake County.
Uncompaghre County State of Colorado 188302271883-02-27 188303021883-03-02 Ouray County was renamed Uncompaghre County for only four days in 1883.
South Arapahoe County State of Colorado 190211151902-11-15 190304111903-04-11 One of three counties created from Arapahoe County in 1902. The name was changed back to Arapahoe County after five months.

No organized counties of the District of Louisiana, the Territory of Missouri, the extralegal State of Deseret, or the Territory of Nebraska existed within the present boundaries of the state of Colorado.

County distinctions [edit]

1. Costilla County was the first area within the present State of Colorado to be settled by Europeans in 1851.
2. Taos County, created by the Territory of New Mexico in 1852, was the first organized county to extend into the area of the present State of Colorado.
3. Arapahoe County, created by the Territory of Kansas in 1855, was the first county created exclusively within the area of the present State of Colorado.
4. On November 28, 1859, the extralegal Territory of Jefferson created 12 counties:[13]
The 12 counties of the
Territory of Jefferson
County County Seat
Arrappahoe County Denver City
Cheyenne County
El Paso County Colorado City
Fountain County Pueblo
Heele County La Porte
Jackson County Boulder City
Jefferson County Arapahoe City
Golden City
Mountain County Central City
North County
Park County Tarryall City
Saint Vrain's CountySt. Vrain's County Saint VrainSt. Vrain
Saratoga County Breckinridge
5. On November 1, 1861, the Territory of Colorado created the 17 original Colorado counties:[3]
The 17 original counties of the
Territory of Colorado
County First County Seat
Arapahoe County Denver City
Boulder County Boulder City
Clear Creek County Idaho
Costilla County San Miguel
Douglas County Franktown
El Paso County Colorado City
Fremont County Cañon City
Gilpin County Central City
Guadaloupe County Guadaloupe
Huerfano County Autobees
Jefferson County Golden City
Lake County Oro City
Larimer County La Porte
Park County Tarryall City
Pueblo County Pueblo
Summit County Parkville
Weld County Saint VrainSt. Vrain
6. Of the 17 original Colorado counties created in 1861, only Gilpin County and Clear Creek County have retained their original boundaries with only minor survey changes.
7. Guadalupe County was the first Colorado county to be renamed in 1861.
8. Las Animas County was the first new Colorado county to be created (in 1866) after the original 17 counties.
9. Greenwood County was the longest lived former Colorado county, existing four years from 1870 to 1874.
10. In 1876, San Juan County became the last county created by the Territory of Colorado.
11. In 1877, Ouray County became the first county created by the new State of Colorado.
12. Carbonate County was the shortest lived former Colorado county, existing only two days in 1879 before being dissolved.
13. The City and County of Broomfield became the newest Colorado county in 2001.
14. Las Animas County is the most extensive Colorado county.
15. The City and County of Broomfield is the least extensive Colorado county.
16. El Paso County is the most populous Colorado county.
17. San Juan County is the least populous Colorado county.
18. El Paso County and the City and County of Denver are among the 100 most populous counties of the United States.
19. San Juan County, Mineral County, Hinsdale County, Jackson County, Kiowa County, Cheyenne County, and Dolores County are among the 100 least populous counties of the United States.
20. The City and County of Denver is the most densely populated Colorado county.
21. Hinsdale County is the least densely populated Colorado county.
22. Hinsdale County, Kiowa County, Mineral County, and Jackson County have fewer than one resident per square mile (0.386 km−2).
23. Lake County has the highest point in Colorado at the summit of Mount Elbert at 14,440 feet (4,401 m) elevation (the highest point in the entire Rocky Mountains).
24. Yuma County has the lowest point in Colorado where the Arikaree River flows into Kansas at 3,317 feet (1,011 m) elevation (the highest low point of any U.S. state).
25. Jefferson County borders ten other counties, the most of any Colorado county.[14]
26. Delta County and the City and County of Denver each border only three other counties, the fewest of Colorado counties.[15]
27. The following twelve Colorado counties have a county seat with the same name as the county:
County County Seat
Alamosa County City of Alamosa
Boulder County City of Boulder
BroomfieldCity and County of Broomfield City and County of Broomfield
Conejos County unincorporated town of Conejos
Delta County City of Delta
DenverCity and County of Denver City and County of Denver
Eagle County Town of Eagle
Gunnison County City of Gunnison
Montrose County City of Montrose
Ouray County City of Ouray
Pueblo County City of Pueblo
Saguache County Town of Saguache
28. The name of each of the following two Colorado counties forms one part of the name of its county seat:
County County Seat
Cheyenne County Town of Cheyenne Wells
Morgan County City of Fort Morgan
29. Weld County has the most incorporated municipalities of any Colorado county with 31.
30. The following nine Colorado counties have no incorporated municipalities other than their county seat:
County County Seat
Archuleta County Town of Pagosa Springs
Bent County City of Las Animas
BroomfieldCity and County of Broomfield City and County of Broomfield
DenverCity and County of Denver City and County of Denver
Hinsdale County Town of Lake City
Jackson County Town of Walden
Lake County City of Leadville
Mineral County Town of Creede
San Juan County Town of Silverton
31. Of all 64 Colorado counties, only Conejos County has a county seat that is not an incorporated municipality.
32. Only three Colorado county seats extend into other counties:
County County Seat Other Counties
Adams County City of Brighton Weld County
Arapahoe County City of Littleton Douglas County and Jefferson County
Gilpin County Central City Clear Creek County
33. The City and County of Denver and the City and County of Broomfield are the only two Colorado counties with enclaves.
34. Arapahoe County, Boulder County, and Jefferson County are the only three dismembered Colorado counties with exclaves.
35. San Juan County has the highest mean elevation of any U.S. county at 11,240 feet (3,426 m). The 25 highest U.S. counties by mean elevation are:[16]
Highest Counties in the United States
Rank County State Mean Elevation
!000001 San Juan County  Colorado 11,240 feet (3,426 m)
!000002 Hinsdale County  Colorado 10,826 feet (3,300 m)
!000003 Lake County  Colorado 10,790 feet (3,289 m)
!000004 Mineral County  Colorado 10,411 feet (3,173 m)
!000005 Summit County  Colorado 10,365 feet (3,159 m)
!000006 Clear Creek County  Colorado 10,264 feet (3,128 m)
!000007 Pitkin County  Colorado 9,940 feet (3,030 m)
!000008 Chaffee County  Colorado 9,915 feet (3,022 m)
!000009 Park County  Colorado 9,572 feet (2,918 m)
!000010 Gunnison County  Colorado 9,488 feet (2,892 m)
!000011 Gilpin County  Colorado 9,236 feet (2,815 m)
!000012 Grand County  Colorado 9,204 feet (2,805 m)
!000013 Saguache County  Colorado 9,193 feet (2,802 m)
!000014 Teller County  Colorado 9,052 feet (2,759 m)
!000015 Rio Grande County  Colorado 9,011 feet (2,747 m)
!000016 Custer County  Colorado 8,988 feet (2,740 m)
!000017 Eagle County  Colorado 8,987 feet (2,739 m)
!000018 Ouray County  Colorado 8,951 feet (2,728 m)
!000019 Jackson County  Colorado 8,863 feet (2,701 m)
!000020 Conejos County  Colorado 8,774 feet (2,674 m)
!000021 Costilla County  Colorado 8,681 feet (2,646 m)
!000022 Taos County  New Mexico 8,510 feet (2,594 m)
!000023 Summit County  Utah 8,388 feet (2,557 m)
!000024 Dolores County  Colorado 8,280 feet (2,524 m)
!000025 Archuleta County  Colorado 8,101 feet (2,469 m)

See also [edit]

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References [edit]

  1. ^ "Colorado Counties as of May 1, 2011". State of Colorado, Department of Local Affairs. May 1, 2011. Retrieved May 2, 2011. 
  2. ^ a b c d e f g h i j k "County Totals Datasets: Population, Population Change and Estimated Components of Population Change: April 1, 2010 to July 1, 2012". 2012 Population Estimates. United States Census Bureau, Population Division. March 2013. Retrieved May 21, 2013. 
  3. ^ a b "Colorado Government History". State of Colorado, Department of Personnel & Administration, Colorado State Archives. April 18, 2001. Retrieved May 2, 2011. 
  4. ^ "Colorado County Seats". State of Colorado, Department of Public Health and Environment. Retrieved May 2, 2011. 
  5. ^ "Colorado Department of Transportation Maps". State of Colorado, Department of Transportation. Retrieved May 6, 2011. 
  6. ^ See the Table of the highest major summits of Colorado
  7. ^ "Colorado County High Points". peakbagger.com. Retrieved May 2, 2011. 
  8. ^ a b Elevations include an adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88). For further information, please see this United States National Geodetic Survey note.
  9. ^ "Colorado County Maps". anyplaceamerica.com. Retrieved May 2, 2011. 
  10. ^ Only a few of these county low points have been verified.
  11. ^ The name "Saguache" is pronounced /səˈwætʃ/. This name comes from the Ute language noun "sawup" (pronunciation: /səˈwʌp/) meaning "sand dunes". The Spanish language version of this name is usually spelled "Saguache", while the English language version is usually spelled "Sawatch".
  12. ^ Merkl, Dameon (February 26, 2013), "What's in a Colorado name pronunciation?", The Denver Post, retrieved March 7, 2013 
  13. ^ a b Provisional Laws and Joint Resolutions of the General Assembly of Jefferson Territory. General Assembly of the Territory of Jefferson. 1859-1860. Retrieved 2011-05-05. 
  14. ^ Jefferson County, Colorado, borders Boulder County, the City and County of Broomfield, Adams County, the City and County of Denver, Arapahoe County, Douglas County, Teller County, Park County, Clear Creek County, and Gilpin County, Colorado.
  15. ^ Delta County, Colorado, borders Gunnison County, Montrose County, and Mesa County, Colorado. The City and County of Denver, Colorado, borders Adams County, Arapahoe County, and Jefferson County, Colorado.
  16. ^ "Mean County Elevation Lists". County Highpointers. Retrieved May 2, 2011. 

External links [edit]

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