61488 -- U.S. ZIP code Municipality (1990): WATAGA, Illinois All ZIPs for this municipality (1990): 61488 Population (2000): 1199 Housing Units (2000): 517 Land area (2000): 23.301325 sq. miles (60.350151 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 23.301325 sq. miles (60.350151 sq. km) Located within: Illinois (IL) Location: 41.030951 N, 90.297052 W