61101 -- U.S. ZIP code
Municipality (1990): ROCKFORD, Illinois
All ZIPs for this municipality (1990):
61101 61102 61103 61104 61107 61108
61109 61112
Population (2000): 23347
Housing Units (2000): 8947
Land area (2000): 41.704511 sq. miles (108.014184 sq. km)
Water area (2000): 0.018931 sq. miles (0.049032 sq. km)
Total area (2000): 41.723442 sq. miles (108.063216 sq. km)
Located within: Illinois (IL)
Location: 42.292221 N, 89.125740 W