Topeka, IL -- U.S. village in Illinois Population (2000): 90 Housing Units (2000): 36 Land area (2000): 0.138878 sq. miles (0.359693 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.138878 sq. miles (0.359693 sq. km) FIPS code: 75757 Located within: Illinois (IL), FIPS 17 Location: 40.329960 N, 89.931034 W ZIP Codes (1990): 61567 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Topeka, IL Topeka