St. Clair County, Illinois

St. Clair County is a located in the  of, and determined by the  to include the  in. As of 2000, the population was 256,082. Its is.

It is a part of the. St. Clair County is also the first county established in the state of Illinois. Its existence actually precedes the state of Illinois as it was one of two counties established in the in 1790. The County was named in honor of, Governor of the Northwest Territory, who organized the county in. In its original boundaries, the county covered two-thirds of present-day Illinois.

Geography
According to the, the county has a total area of 1,746 (674 ). 1,719 km² (664 sq mi) of it is land and 26 km² (10 sq mi) of it (1.51%) is water.

Adjacent Counties

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 * (northeast)
 * (east)
 * (south)
 * (southwest)
 * (west)1
 * (west)

1This is not a county, but an which is not part of a county.

Demographics
As of the of 2000, there were 256,082 people, 96,810 households, and 67,282 families residing in the county. The was 149/km² (386/sq mi). There were 104,446 housing units at an average density of 61/km² (157/sq mi). The racial makeup of the county was 67.94%, 28.77% or , 0.26% , 0.91% , 0.05% , 0.80% from , and 1.29% from two or more races. 2.19% of the population were or  of any race.

There were 96,810 households out of which 34.50% had children under the age of 18 living with them, 48.10% were living together, 17.10% had a female householder with no husband present, and 30.50% were non-families. 25.90% of all households were made up of individuals and 10.30% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.13.

In the county the population was spread out with 27.70% under the age of 18, 8.90% from 18 to 24, 29.20% from 25 to 44, 21.10% from 45 to 64, and 13.20% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 91.40 males. For every 100 females age 18 and over, there were 87.20 males.

The median income for a household in the county was $39,148, and the median income for a family was $47,409. Males had a median income of $36,569 versus $25,773 for females. The for the county was $18,932. About 11.80% of families and 14.50% of the population were below the, including 21.60% of those under age 18 and 9.80% of those age 65 or over.

Cities and towns

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 * (also known as )