Centralia is a city in Boone county in the U.S. state of Missouri. The population was 4,027 at the 2010 census, with an estimated population of 4,244 in 2018. A very small portion of the city lies in Audrain County.
Centralia is located at 39°12′35″N 92°8′11″W / 39.20972°N 92.13639°W / 39.20972; -92.13639 (39.209657, -92.136300). According to the United States Census Bureau, the city has a total area of 2.84 square miles (7.36 km), all land.
As of the census of 2010, there were 4,027 people, 1,601 households, and 1,063 families residing in the city. The population density was 1,418.0 inhabitants per square mile (547.5/km). There were 1,755 housing units at an average density of 618.0 per square mile (238.6/km). The racial makeup of the city was 96.5% White, 1.0% African American, 0.4% Native American, 0.2% Asian, 0.5% from other races, and 1.3% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 1,601 households of which 36.0% had children under the age of 18 living with them, 48.4% were married couples living together, 12.7% had a female householder with no husband present, 5.2% had a male householder with no wife present, and 33.6% were non-families. 28.3% of all households were made up of individuals and 14.1% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.01.
The median age in the city was 38 years. 26.6% of residents were under the age of 18; 7.3% were between the ages of 18 and 24; 25.5% were from 25 to 44; 23% were from 45 to 64; and 17.7% were 66 years of age or older. The gender makeup of the city was 46.5% male and 53.5% female.
As of the census of 2000, there were 3,774 people, 1,505 households, and 1,032 families residing in the city. The population density was 1,492.0 people per square mile (575.9/km²). There were 1,648 housing units at an average density of 651.5 per square mile (251.5/km²). The racial makeup of the city was 97.11% White, 1.14% African American, 0.42% Native American, 0.08% Asian, 0.21% from other races, and 1.03% from two or more races. Hispanic or Latino of any race were 0.82% of the population.
There were 1,505 households out of which 37.7% had children under the age of 18 living with them, 53.3% were married couples living together, 12.6% had a female householder with no husband present, and 31.4% were non-families. 27.7% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.97.
In the city, the population was spread out with 28.2% under the age of 18, 7.3% from 18 to 24, 27.9% from 25 to 44, 19.1% from 45 to 64, and 17.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 83.8 males. For every 100 females age 18 and over, there were 77.8 males.
The median income for a household in the city was $34,475, and the median income for a family was $40,671. Males had a median income of $30,399 versus $21,115 for females. The per capita income for the city was $17,583. About 2.8% of families and 4.5% of the population were below the poverty line, including 3.0% of those under age 18 and 8.0% of those age 65 or over.