61053 -- U.S. ZIP code Municipality (1990): MOUNT CARROLL, Illinois All ZIPs for this municipality (1990): 61053 Population (2000): 3228 Housing Units (2000): 1425 Land area (2000): 113.611964 sq. miles (294.253623 sq. km) Water area (2000): 0.020834 sq. miles (0.053959 sq. km) Total area (2000): 113.632798 sq. miles (294.307582 sq. km) Located within: Illinois (IL) Location: 42.100900 N, 89.982556 W