Centralia is located in Illinois. Centralia, Illinois has a population of 12,233. Centralia is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 27%.
The median household income in Centralia, Illinois is $39,459. The median household income for the surrounding county is $48,351 compared to the national median of $66,222. The median age of people living in Centralia is 41.2 years.
The average high temperature in July is 88.2 degrees, with an average low temperature in January of 18.1 degrees. The annual precipitation is 42.92.