Warsaw, IN -- U.S. city in Indiana Population (2000): 12415 Housing Units (2000): 5101 Land area (2000): 10.480736 sq. miles (27.144981 sq. km) Water area (2000): 1.067436 sq. miles (2.764647 sq. km) Total area (2000): 11.548172 sq. miles (29.909628 sq. km) FIPS code: 80306 Located within: Indiana (IN), FIPS 18 Location: 41.240564 N, 85.847002 W ZIP Codes (1990): 46580 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Warsaw, IN Warsaw