62340 -- U.S. ZIP code Municipality (1990): GRIGGSVILLE, Illinois All ZIPs for this municipality (1990): 62340 Population (2000): 1800 Housing Units (2000): 806 Land area (2000): 89.262823 sq. miles (231.189640 sq. km) Water area (2000): 0.328843 sq. miles (0.851700 sq. km) Total area (2000): 89.591666 sq. miles (232.041340 sq. km) Located within: Illinois (IL) Location: 39.713450 N, 90.720452 W