61447 -- U.S. ZIP code Municipality (1990): KIRKWOOD, Illinois All ZIPs for this municipality (1990): 61447 Population (2000): 1116 Housing Units (2000): 455 Land area (2000): 45.578765 sq. miles (118.048454 sq. km) Water area (2000): 0.088585 sq. miles (0.229435 sq. km) Total area (2000): 45.667350 sq. miles (118.277889 sq. km) Located within: Illinois (IL) Location: 40.867285 N, 90.757591 W