62673 -- U.S. ZIP code Municipality (1990): OAKFORD, Illinois All ZIPs for this municipality (1990): 62673 Population (2000): 620 Housing Units (2000): 257 Land area (2000): 39.905914 sq. miles (103.355839 sq. km) Water area (2000): 0.438283 sq. miles (1.135149 sq. km) Total area (2000): 40.344197 sq. miles (104.490988 sq. km) Located within: Illinois (IL) Location: 40.095009 N, 89.969988 W