Grundy County, Illinois

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Grundy County, Illinois
Grundy County Courthouse (7395451684).jpg
Grundy County Courthouse
Map of Illinois highlighting Grundy County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded February 17, 1841
Named for Felix Grundy
Seat Morris
Largest city Morris
Area
 • Total 430 sq mi (1,114 km2)
 • Land 418 sq mi (1,083 km2)
 • Water 12 sq mi (31 km2), 2.9%
Population
 • (2010) 50,063
 • Density 120/sq mi (46/km²)
Congressional district 16th
Time zone Central: UTC-6/-5

Grundy County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 50,063.[1] Its county seat is Morris.[2]

Grundy County is part of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.

In 2010, the center of population of Illinois was located in Grundy County, just northeast of the village of Mazon.[3]

Illinois' State Fossil, the unique and bizarre Tully Monster was first found in Mazon Creek. Grundy County Speedway is located in Morris.

History[edit]

Grundy County was established on February 17, 1841. It was formed out of LaSalle County and named for Felix Grundy.[4]

Geography[edit]

According to the U.S. Census Bureau, the county has a total area of 430 square miles (1,100 km2), of which 418 square miles (1,080 km2) is land and 12 square miles (31 km2) (2.9%) is water.[5]

Climate and weather[edit]

Morris, Illinois
Climate chart (explanation)
J F M A M J J A S O N D
 
 
1.8
 
30
13
 
 
1.6
 
35
18
 
 
2.7
 
47
29
 
 
3.5
 
61
39
 
 
4
 
73
50
 
 
4.2
 
83
59
 
 
3.7
 
85
63
 
 
3.4
 
83
61
 
 
3
 
76
53
 
 
2.5
 
64
41
 
 
3.1
 
48
31
 
 
2.4
 
35
19
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[6]

In recent years, average temperatures in the county seat of Morris have ranged from a low of 13 °F (−11 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −24 °F (−31 °C) was recorded in January 1985 and a record high of 103 °F (39 °C) was recorded in June 1988. Average monthly precipitation ranged from 1.59 inches (40 mm) in February to 4.16 inches (106 mm) in June.[6]

Major highways[edit]

Adjacent counties[edit]

Demographics[edit]

Historical population
Census Pop.
1850 3,023
1860 10,379 243.3%
1870 14,938 43.9%
1880 16,732 12.0%
1890 21,024 25.7%
1900 24,136 14.8%
1910 24,162 0.1%
1920 18,580 −23.1%
1930 18,678 0.5%
1940 18,398 −1.5%
1950 19,217 4.5%
1960 22,350 16.3%
1970 26,535 18.7%
1980 30,582 15.3%
1990 32,337 5.7%
2000 37,535 16.1%
2010 50,063 33.4%
Est. 2013 50,228 0.3%
U.S. Decennial Census[7]
1790-1960[8] 1900-1990[9]
1990-2000[10] 2010-2013[1]
2000 census age pyramid for Grundy County

As of the U.S. Census of 2000,[11] there were 37,535 people, 14,293 households, and 10,276 families residing in the county. The population density was 89 people per square mile (35/km²). There were 15,040 housing units at an average density of 36 per square mile (14/km²). The racial makeup of the county was 97.09% White, 0.19% Black or African American, 0.24% Native American, 0.30% Asian, 0.01% Pacific Islander, 1.30% from other races, and 0.87% from two or more races. 4.13% of the population were Hispanic or Latino of any race. 20.7% were of German, 15.2% Irish, 12.0% Italian, 8.3% Norwegian, 7.4% English and 6.7% American ancestry according to Census 2000. 95.2% spoke English and 3.7% Spanish as their first language.

There were 14,293 households out of which 35.30% had children under the age of 18 living with them, 59.60% were married couples living together, 8.60% had a female householder with no husband present, and 28.10% were non-families. 23.50% of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.09.

In the county the population was spread out with 26.60% under the age of 18, 8.30% from 18 to 24, 30.20% from 25 to 44, 22.50% from 45 to 64, and 12.30% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 98.90 males. For every 100 females age 18 and over, there were 97.40 males.

The median income for a home in the county is $51,719, and the median income for a family was $60,862. Males had a median income of $46,392 versus $26,487 for females. The per capita income for the county was $22,591. About 3.20% of families and 4.80% of the population were below the poverty line, including 5.00% of those under age 18 and 6.00% of those age 65 or over.

Communities[edit]

Map of Grundy County, Illinois.

City[edit]

Villages[edit]

Townships[edit]

Grundy County is divided into seventeen townships:

See also[edit]

References[edit]

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 5, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ "Centers of Population by State: 2010". United States Census Bureau. Retrieved July 5, 2014. 
  4. ^ Adams, James N. (compiler) (1989), Keller, William E., ed., Illinois Place Names, Springfield: Illinois State Historical Society, p. 581, ISBN 0-912226-24-2 
  5. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23. 
  6. ^ a b "Monthly Averages for Morris, Illinois". The Weather Channel. Retrieved 2011-01-27. 
  7. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 5, 2014. 
  8. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 5, 2014. 
  9. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 5, 2014. 
  10. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. Retrieved July 5, 2014. 
  11. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31. 

External links[edit]

Coordinates: 41°17′N 88°26′W / 41.29°N 88.43°W / 41.29; -88.43