62280 -- U.S. ZIP code Municipality (1990): ROCKWOOD, Illinois All ZIPs for this municipality (1990): 62280 Population (2000): 443 Housing Units (2000): 188 Land area (2000): 55.311098 sq. miles (143.255081 sq. km) Water area (2000): 1.088229 sq. miles (2.818499 sq. km) Total area (2000): 56.399327 sq. miles (146.073580 sq. km) Located within: Illinois (IL) Location: 37.845454 N, 89.668782 W