62628 -- U.S. ZIP code Municipality (1990): CHAPIN, Illinois All ZIPs for this municipality (1990): 62628 Population (2000): 1033 Housing Units (2000): 413 Land area (2000): 40.580153 sq. miles (105.102110 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 40.580153 sq. miles (105.102110 sq. km) Located within: Illinois (IL) Location: 39.770936 N, 90.393079 W