Clayton, IL -- U.S. village in Illinois Population (2000): 904 Housing Units (2000): 384 Land area (2000): 0.874272 sq. miles (2.264355 sq. km) Water area (2000): 0.001915 sq. miles (0.004959 sq. km) Total area (2000): 0.876187 sq. miles (2.269314 sq. km) FIPS code: 14767 Located within: Illinois (IL), FIPS 17 Location: 40.029220 N, 90.958122 W ZIP Codes (1990): 62324 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Clayton, IL Clayton