Putnam County, Illinois

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Putnam County, Illinois
Map of Illinois highlighting Putnam County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded 1825
Named for Israel Putnam
Seat Hennepin
Largest village Granville
Area
 • Total 172 sq mi (445 km2)
 • Land 160 sq mi (414 km2)
 • Water 12 sq mi (31 km2), 7.0%
Population
 • (2010) 6,006
 • Density 37/sq mi (14/km²)
Congressional district 16th
Time zone Central: UTC-6/-5

Putnam County is the least extensive county in the U.S. state of Illinois. According to the 2010 census, it had a population of 6,006.[1] The county seat is Hennepin.[2] The county was formed in 1825 out of Fulton County and named after Israel Putnam,[3] who was a general in the American Revolution.

Putnam County is part of the Ottawa-Peru, IL Micropolitan Statistical Area, which is also included in the Chicago-Naperville, IL-IN-WI Combined Statistical Area.

Geography[edit]

According to the U.S. Census Bureau, the county has a total area of 172 square miles (450 km2), of which 160 square miles (410 km2) is land and 12 square miles (31 km2) (7.0%) is water.[4] It is the smallest county in Illinois by area.

Climate and weather[edit]

Hennepin, Illinois
Climate chart (explanation)
J F M A M J J A S O N D
 
 
1.1
 
 
30
13
 
 
1.2
 
 
36
19
 
 
2.2
 
 
48
29
 
 
3.2
 
 
62
39
 
 
3.6
 
 
73
50
 
 
4.2
 
 
83
59
 
 
3.8
 
 
86
64
 
 
4.3
 
 
84
62
 
 
3.6
 
 
77
53
 
 
2.7
 
 
65
41
 
 
2.5
 
 
49
31
 
 
2
 
 
36
19
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[5]

In recent years, average temperatures in the county seat of Hennepin have ranged from a low of 13 °F (−11 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −30 °F (−34 °C) was recorded in January 1999 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 1.14 inches (29 mm) in January to 4.32 inches (110 mm) in August.[5]

Major highways[edit]

Adjacent counties[edit]

Demographics[edit]

Historical population
Census Pop.
1840 2,131
1850 3,924 84.1%
1860 5,587 42.4%
1870 6,280 12.4%
1880 5,554 −11.6%
1890 4,730 −14.8%
1900 4,746 0.3%
1910 7,561 59.3%
1920 7,579 0.2%
1930 5,235 −30.9%
1940 5,289 1.0%
1950 4,746 −10.3%
1960 4,570 −3.7%
1970 5,007 9.6%
1980 6,085 21.5%
1990 5,730 −5.8%
2000 6,086 6.2%
2010 6,006 −1.3%
Est. 2013 5,801 −3.4%
U.S. Decennial Census[6]
1790-1960[7] 1900-1990[8]
1990-2000[9] 2010-2013[1]

As of the 2010 United States Census, there were 6,006 people, 2,509 households, and 1,734 families residing in the county.[10] The population density was 37.5 inhabitants per square mile (14.5/km2). There were 3,074 housing units at an average density of 19.2 per square mile (7.4/km2).[4] The racial makeup of the county was 96.6% white, 0.5% black or African American, 0.2% Asian, 0.1% American Indian, 1.4% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 4.2% of the population.[10] In terms of ancestry, 46.5% were German, 16.7% were Irish, 16.3% were Italian, 10.9% were Polish, 10.1% were English, 5.1% were Swedish, and 3.5% were American.[11]

Of the 2,509 households, 27.7% had children under the age of 18 living with them, 57.6% were married couples living together, 7.2% had a female householder with no husband present, 30.9% were non-families, and 26.0% of all households were made up of individuals. The average household size was 2.39 and the average family size was 2.85. The median age was 45.2 years.[10]

The median income for a household in the county was $56,458 and the median income for a family was $68,875. Males had a median income of $50,205 versus $31,886 for females. The per capita income for the county was $27,004. About 6.2% of families and 10.9% of the population were below the poverty line, including 21.8% of those under age 18 and 5.4% of those age 65 or over.[12]

Communities[edit]

Villages[edit]

Unincorporated communities[edit]

Townships[edit]

Putnam County is divided into four townships:

See also[edit]

References[edit]

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 8, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ "About Putnam County". Putnam County, Illinois. Retrieved 2012-07-27. 
  4. ^ a b "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2015-07-12. 
  5. ^ a b "Monthly Averages for Hennepin, Illinois". The Weather Channel. Retrieved 2011-01-27. 
  6. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 8, 2014. 
  7. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 8, 2014. 
  8. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 8, 2014. 
  9. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 8, 2014. 
  10. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved 2015-07-12. 
  11. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12. 
  12. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-12. 

External links[edit]

Coordinates: 41°12′N 89°17′W / 41.20°N 89.28°W / 41.20; -89.28