Iowa Gazetteer > Iowa ZIP Codes > County ZIP Codes > Union ZIP Codes

Also see: ZIP Codes in Union with Associated Cities & Towns

ZIP Codes in Union County with Associated Cities & Towns

Afton   50830
Arispe   50831
Creston   50801
 Cromwell   50842
Lorimor   50149
 Shannon City   50861
Thayer   50254

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.