61569 -- U.S. ZIP code Municipality (1990): TRIVOLI, Illinois All ZIPs for this municipality (1990): 61569 Population (2000): 1215 Housing Units (2000): 482 Land area (2000): 38.577444 sq. miles (99.915117 sq. km) Water area (2000): 0.316860 sq. miles (0.820664 sq. km) Total area (2000): 38.894304 sq. miles (100.735781 sq. km) Located within: Illinois (IL) Location: 40.691022 N, 89.891387 W