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Carroll County, Illinois Zip Codes
Zip Code
City
Population
61074
Savanna
4,093
61053
Mount Carroll
2,839
61285
Thomson
2,661
61046
Lanark
2,659
61051
Milledgeville
1,549
61078
Shannon
1,255
61014
Chadwick
1,064
Population is the most recent figure from the U.S. Census Bureau's 2022
American Community Survey (ACS) 5-Year Estimates
.