60048 -- U.S. ZIP code Municipality (1990): LIBERTYVILLE, Illinois All ZIPs for this municipality (1990): 60048 Population (2000): 28562 Housing Units (2000): 10011 Land area (2000): 29.750976 sq. miles (77.054670 sq. km) Water area (2000): 0.704296 sq. miles (1.824118 sq. km) Total area (2000): 30.455272 sq. miles (78.878788 sq. km) Located within: Illinois (IL) Location: 42.290922 N, 87.951695 W