St. Clair County is a
county located in the U.S. state of Illinois, and
determined by the U.S. Census Bureau
to include the
mean center of U.S.
in 1970. As of 2006, the population was 260,919.
county seat is Belleville, Illinois.
It is a part of the St. Louis Metropolitan
. 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 established in the Northwest Territory
in 1790. The county
was named in honor of Arthur St.
, Governor of the Northwest Territory, who organized the
county in 1790. In its original boundaries, the county covered
two-thirds of present-day Illinois.
According to the U.S. Census Bureau
, the county has a total
area of 674 square miles
), of which 664 square
miles (1,719 km²) is land and 10 square miles
(26 km²) (1.51%) is water.
forms part of the semi-rural, sparsely-populated eastern portion of
the St. Louis metropolitan area (nicknamed "Metro East") along with
neighboring Madison County.
Unlike the suburbs on the Missouri side of
the metro area, those in Metro East are typically separated by
large swaths of corn
fields or otherwise undeveloped land. Thus,
low-income neighborhoods in East St. Louis, Washington Park, and
other cities in St. Clair County often border agricultural or
vacant lands. In some places, truck stops, strip clubs, and other
semi-rural businesses abut these neighborhoods as well.
Belleville, Cahokia, Canteen, Caseyville, Centreville, Dupo, East
St. Louis, Englemann, Freeburg, Lebanon, Lenzburg, Marissa,
Mascoutah, Millstadt, New Athens, O'Fallon, Prairie Du Long, Shiloh
Valley, Smithton, Saint Claire, Stites, Stookey, Sugar Loaf
This is not a county, but an independent city
which is not part of a
As of the census
of 2000, there were 256,082
people, 96,810 households, and 67,282 families residing in the
county. The population density
was 386 people per square mile (149/km²). There were 104,446
housing units at an average density of 157 per square mile
(61/km²). The racial makeup of the county was 67.94% White
, 28.77% Black
or African American
, 0.26% Native American
, 0.91% Asian American
, 0.05% Pacific Islander
, 0.80% from
, and 1.29%
from two or more races. 2.19% of the population were Hispanic
of any race. 26.9% were of
German, 7.3% Irish, 7.0% American and 6.1% English
ancestry according to Census
There were 96,810 households out of which 34.50% had children under
the age of 18 living with them, 48.10% were married couples
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 per capita income
for the county was
$18,932. About 11.80% of families and 14.50% of the population were
below the poverty line
21.60% of those under age 18 and 9.80% of those age 65 or
Cities and towns
Lebanon historic district
Lebanon Mermaid House Hotel
St. Clair County is divided into these townships