62556 -- U.S. ZIP code Municipality (1990): CLARKSDALE, Illinois All ZIPs for this municipality (1990): 62556 Population (2000): 418 Housing Units (2000): 172 Land area (2000): 18.632586 sq. miles (48.258174 sq. km) Water area (2000): 0.013287 sq. miles (0.034414 sq. km) Total area (2000): 18.645873 sq. miles (48.292588 sq. km) Located within: Illinois (IL) Location: 39.465887 N, 89.390956 W