61102 -- U.S. ZIP code
Municipality (1990): ROCKFORD, Illinois
All ZIPs for this municipality (1990):
61101 61102 61103 61104 61107 61108
61109 61112
Population (2000): 20383
Housing Units (2000): 7594
Land area (2000): 31.962764 sq. miles (82.783176 sq. km)
Water area (2000): 0.035817 sq. miles (0.092766 sq. km)
Total area (2000): 31.998581 sq. miles (82.875942 sq. km)
Located within: Illinois (IL)
Location: 42.255170 N, 89.129707 W