US Gazetteer > Illinois Gazetteer > Illinois ZIP Codes > County ZIP Codes > Carroll ZIP Codes

ZIP Codes in Carroll County with Associated Cities & Towns

Chadwick   61014
Lanark   61046
Milledgeville   61051
 Mount Carroll   61053
Savanna   61074
 Shannon   61078
Thomson   61285

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.