61545 -- U.S. ZIP code Municipality (1990): CAZENOVIA, Illinois All ZIPs for this municipality (1990): 61545 Population (2000): 651 Housing Units (2000): 263 Land area (2000): 31.762684 sq. miles (82.264971 sq. km) Water area (2000): 0.030653 sq. miles (0.079390 sq. km) Total area (2000): 31.793337 sq. miles (82.344361 sq. km) Located within: Illinois (IL) Location: 40.873236 N, 89.370820 W