Topeka, IN -- U.S. town in Indiana Population (2000): 1159 Housing Units (2000): 482 Land area (2000): 1.377808 sq. miles (3.568505 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.377808 sq. miles (3.568505 sq. km) FIPS code: 76184 Located within: Indiana (IN), FIPS 18 Location: 41.538876 N, 85.540063 W ZIP Codes (1990): 46571 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Topeka, IN Topeka