Grundy County, Illinois Information & Grundy County, Illinois Links at HealthHaven.com

Grundy County
	Grundy County, Illinois
	; Location in the state of Illinois
	; Illinois's location in the U.S.
Seat	Morris
Largest city	Morris
Area; - Total; - Land; - Water	; 430 sq mi (1,115 km²); 420 sq mi (1,088 km²); 11 sq mi (27 km²), 2.44%
Population; - (2000); - Density	; 37,535; 89/sq mi (35/km²)
Founded	February 17, 1841
Time zone	Central: UTC-6/-5

Grundy County is a county located in the U.S. state of Illinois. As of 2000, the population was 37,535. Its county seat is Morris.^[1] The center of population of Illinois is located in Grundy County, in the village of Mazon.^[2] This county is part of the Chicago metropolitan area. Illinois' State Fossil, the unique and bizarre Tully Monster was first found in Mazon Creek. Grundy County Speedway is located in Morris.

[edit] Geography

According to the U.S. Census Bureau, the county has a total area of 430 square miles (1,115 km²), of which 420 square miles (1,088 km²) is land and 11 square miles (27 km²) (2.44%) is water.

[edit] Major highways

[edit] Adjacent Counties

Kendall (north)
Will (east)
Kankakee (southeast)
Livingston (south)
LaSalle (west)

[edit] Political subdivisions

[edit] Cities

Morris

[edit] Villages

[edit] Townships

Grundy County is divided into seventeen townships:

[edit] Demographics

Historical populations
Census	Pop.	%±
1850	5,681	—
1860	9,393	65.3%
1870	12,652	34.7%
1880	16,129	27.5%
1890	17,138	6.3%
1900	24,136	40.8%
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%
UVa Census Browser 1830-1840^[3] Illinois Counties 1900-1990^[4]

2000 census age pyramid for Grundy County.

As of the U.S. Census of 2000,^[5] 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.