61072 -- U.S. ZIP code Municipality (1990): ROCKTON, Illinois All ZIPs for this municipality (1990): 61072 Population (2000): 8612 Housing Units (2000): 3214 Land area (2000): 49.089012 sq. miles (127.139951 sq. km) Water area (2000): 0.239371 sq. miles (0.619967 sq. km) Total area (2000): 49.328383 sq. miles (127.759918 sq. km) Located within: Illinois (IL) Location: 42.447856 N, 89.084851 W