is a city located in St. Clair County, Illinois
. As of the 2000
census, the city had a total population of 21,910.
Geography\nO'Fallon is located at 38°35'30" North, 89°54'43" West (38.591549, -89.912000)1
According to the United States Census Bureau
, the city has a total area of 28.3 km²
). 28.3 km² (10.9 mi²) of it is land and 0.09% is water.
Demographics\nAs of the census
, there are 21,910 people, 8,310 households, and 6,016 families residing in the city. The population density
is 775.4/km² (2,007.6/mi²). There are 8,626 housing units at an average density of 305.3/km² (790.4/mi²). The racial makeup of the city is 82.67% White, 11.99% African American
, 0.23% Native American
, 2.47% Asian
, 0.07% Pacific Islander, 0.79% from other races, and 1.77% from two or more races. 2.23% of the population are Hispanic
of any race.
There are 8,310 households out of which 39.6% have children under the age of 18 living with them, 59.0% are married couples living together, 10.5% have a female householder with no husband present, and 27.6% are non-families. 23.2% of all households are made up of individuals and 7.2% have someone living alone who is 65 years of age or older. The average household size is 2.62 and the average family size is 3.13.
In the city the population is spread out with 28.3% under the age of 18, 8.0% from 18 to 24, 32.2% from 25 to 44, 22.7% from 45 to 64, and 8.9% who are 65 years of age or older. The median age is 35 years. For every 100 females there are 93.2 males. For every 100 females age 18 and over, there are 90.1 males.
The median income for a household in the city is $55,927, and the median income for a family is $66,262. Males have a median income of $46,303 versus $30,158 for females. The per capita income for the city is $24,821. 5.0% of the population and 4.1% of families are below the poverty line. Out of the total people living in poverty, 5.0% are under the age of 18 and 7.9% are 65 or older.