Columbia, IL -- U.S. city in Illinois Population (2000): 7922 Housing Units (2000): 3219 Land area (2000): 9.414095 sq. miles (24.382393 sq. km) Water area (2000): 0.020655 sq. miles (0.053497 sq. km) Total area (2000): 9.434750 sq. miles (24.435890 sq. km) FIPS code: 15833 Located within: Illinois (IL), FIPS 17 Location: 38.449172 N, 90.208500 W ZIP Codes (1990): 62236 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Columbia, IL Columbia