61875 -- U.S. ZIP code Municipality (1990): SEYMOUR, Illinois All ZIPs for this municipality (1990): 61875 Population (2000): 795 Housing Units (2000): 298 Land area (2000): 30.015009 sq. miles (77.738513 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 30.015009 sq. miles (77.738513 sq. km) Located within: Illinois (IL) Location: 40.107548 N, 88.424873 W