Rensselaer, IN -- U.S. city in Indiana Population (2000): 5294 Housing Units (2000): 2296 Land area (2000): 2.901096 sq. miles (7.513803 sq. km) Water area (2000): 0.059984 sq. miles (0.155359 sq. km) Total area (2000): 2.961080 sq. miles (7.669162 sq. km) FIPS code: 63792 Located within: Indiana (IN), FIPS 18 Location: 40.938051 N, 87.151341 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Rensselaer, IN Rensselaer