Gridley, CA -- U.S. city in California Population (2000): 5382 Housing Units (2000): 1963 Land area (2000): 1.570175 sq. miles (4.066734 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.570175 sq. miles (4.066734 sq. km) FIPS code: 31260 Located within: California (CA), FIPS 06 Location: 39.362728 N, 121.698016 W ZIP Codes (1990): 95948 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gridley, CA Gridley