Prairie City is a village in McDonough County, Illinois, United States. The population was 461 at the 2000 census.
Prairie City is located at 40°37′15″N 90°27′49″W / 40.62083°N 90.46361°W / 40.62083; -90.46361 (40.620740, -90.463582).
According to the 2010 census, Prairie City has a total area of 1.02 square miles (2.64 km), all land.
State Highway 41 passes through Prairie City.
Per the 2010 US Census, Prairie City had 379 people. Among non-Hispanics this includes 371 White (97.9%), 5 Black (1.3%), 1 Asian (0.3%), & 1 from two or more races. The Hispanic or Latino population included 1 person (0.3%).
There were 135 households out of which 43 had children under the age of 18 living with them, 80 were married couples living together, 5 (3.7%) had a female householder with children & no husband present, and 34 were non-families. 25 households were made up of individuals and 37 had someone who was 65 years of age or older. The average household size was 2.62 and the average family size was 2.92.
The population was spread out with 78.1% over the age of 18 and 19.3% who were 65 years of age or older. The median age was 43.5 years. The gender ratio was 50.1% male & 49.9% female. Among 135 occupied households, 121 were owner-occupied & 14 were renter-occupied.
As of the census of 2000, there were 461 people, 155 households, and 119 families residing in the town. The population density was 455.2 people per square mile (176.2/km²). There were 171 housing units at an average density of 168.8 per square mile (65.4/km²). The racial makeup of the town was 97.61% White, 1.08% Asian, and 1.30% from two or more races. Hispanic or Latino of any race were 0.87% of the population.
There were 155 households out of which 40.0% had children under the age of 18 living with them, 60.0% were married couples living together, 9.7% had a female householder with no husband present, and 22.6% were non-families. 19.4% of all households were made up of individuals and 11.0% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.13.
In the town the population was spread out with 28.6% under the age of 18, 7.8% from 18 to 24, 25.4% from 25 to 44, 18.9% from 45 to 64, and 19.3% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.1 males. For every 100 females age 18 and over, there were 81.8 males.
The median income for a household was $36,875, and the median income for a family was $40,313. Males had a median income of $27,143 versus $21,389 for females. The per capita income for the town was $12,269. About 21.2% of families and 22.6% of the population were below the poverty line, including 31.5% of those under age 18 and 8.0% of those age 65 or over.