Centralia, Illinois

Centralia, Illinois
Buildings in downtown Centralia, Illinois, USA.
Location of Centralia in (clockwise from upper left) Clinton, Marion, Jefferson, and Washington Counties, Illinois.
Coordinates: 38°31′20″N 89°07′58″W / 38.52222°N 89.13278°W / 38.52222; -89.13278
CountryUnited States
StateIllinois
CountiesClinton, Jefferson, Marion, Washington
TownshipsCentralia, Brookside, Grand Prairie,
Irvington
Founded1853
Named afterIllinois Central Railroad
Government
 • TypeManager-Council
 • BodyCity Council
Area
 • Total
9.23 sq mi (23.91 km2)
 • Land8.20 sq mi (21.24 km2)
 • Water1.03 sq mi (2.67 km2)
Elevation
502 ft (153 m)
Population
 (2020)
 • Total
12,182
 • Density1,485.6/sq mi (573.61/km2)
Time zoneUTC−6 (CST)
 • Summer (DST)UTC−5 (CDT)
ZIP code
62801
Area codes618,730
FIPS code17-12164
GNIS ID2393787
Websitecityofcentralia.org

Centralia is a city in Clinton, Jefferson, Marion, and Washington counties in the U.S. state of Illinois with the largest portion in Marion County. The city is the largest in three counties, Clinton, Marion, and Washington, but it is not a county seat for any of them. The population was 12,182 as of the 2020 census, down from 13,032 in 2010.