61876 -- U.S. ZIP code Municipality (1990): SIDELL, Illinois All ZIPs for this municipality (1990): 61876 Population (2000): 851 Housing Units (2000): 340 Land area (2000): 41.175047 sq. miles (106.642878 sq. km) Water area (2000): 0.005226 sq. miles (0.013534 sq. km) Total area (2000): 41.180273 sq. miles (106.656412 sq. km) Located within: Illinois (IL) Location: 39.907331 N, 87.825878 W