61571 -- U.S. ZIP code Municipality (1990): SUNNYLAND, Illinois All ZIPs for this municipality (1990): 61571 Population (2000): 20338 Housing Units (2000): 8283 Land area (2000): 62.682099 sq. miles (162.345885 sq. km) Water area (2000): 0.012049 sq. miles (0.031206 sq. km) Total area (2000): 62.694148 sq. miles (162.377091 sq. km) Located within: Illinois (IL) Location: 40.701037 N, 89.442940 W