Columbia, Illinois

Columbia
City
Downtown Columbia
Flag Logo
Motto(s):  Good for business, good for life
Location of Columbia in Monroe County, Illinois.
Location of Illinois in the United States
Coordinates: 38°26′57″N 90°12′31″W / 38.44917°N 90.20861°W / 38.44917; -90.20861
Country	United States
State	Illinois
County	St. Clair and Monroe[1]
Founded	1859
Government
• Mayor	Bob Hill
Area [2]
• Total	10.38 sq mi (26.88 km2)
• Land	10.32 sq mi (26.74 km2)
• Water	0.06 sq mi (0.14 km2)
Elevation [3]	453 ft (138 m)
Population  (2020)
• Total	10,999
• Density	1,065.48/sq mi (411.37/km2)
Time zone	UTC−6 (CST)
• Summer (DST)	UTC−5 (CDT)
ZIP Code(s)	62236
Area code	618
FIPS code	17-15833
GNIS feature ID	2393604[3]
Wikimedia Commons	Columbia, Illinois
Website	www.columbiaillinois.com

Columbia is a city mainly in Monroe County with a small portion in St. Clair County in the U.S. state of Illinois, about 12 miles (19 km) south of St. Louis, Missouri. The population was 10,999 at the 2020 census.