Clay Center, KS -- U.S. city in Kansas Population (2000): 4564 Housing Units (2000): 2191 Land area (2000): 2.589695 sq. miles (6.707280 sq. km) Water area (2000): 0.000136 sq. miles (0.000352 sq. km) Total area (2000): 2.589831 sq. miles (6.707632 sq. km) FIPS code: 13625 Located within: Kansas (KS), FIPS 20 Location: 39.379920 N, 97.123168 W ZIP Codes (1990): 67432 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Clay Center, KS Clay Center