Centralia is a city located in Marion County, in the state of Illinois (IL), United States. Nestled in the East North Central division of the Midwest region, it covers an area of 7.5 square miles (19.0 km²) and sits at an elevation of 500 ft. With a population of approximately 14,136 residents, Centralia offers a vibrant community life.
The town's population is composed of about 46.12% males and 53.88% females, and it has a population density of 884.80 people per square mile (727.73/km²). Centralia lies at a latitude of 38.53 and a longitude of -89.13, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (11.1%), followed by English (9.9%), German (23.4%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 62801.