Harmony, IN -- U.S. town in Indiana Population (2000): 589 Housing Units (2000): 255 Land area (2000): 0.754158 sq. miles (1.953259 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.754158 sq. miles (1.953259 sq. km) FIPS code: 31486 Located within: Indiana (IN), FIPS 18 Location: 39.535401 N, 87.073872 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Harmony, IN Harmony