Gilbert, AZ -- U.S. town in Arizona Population (2000): 109697 Housing Units (2000): 37007 Land area (2000): 42.956638 sq. miles (111.257178 sq. km) Water area (2000): 0.239864 sq. miles (0.621246 sq. km) Total area (2000): 43.196502 sq. miles (111.878424 sq. km) FIPS code: 27400 Located within: Arizona (AZ), FIPS 04 Location: 33.344439 N, 111.762411 W ZIP Codes (1990): 85234 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gilbert, AZ Gilbert