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ZIP Codes in Allamakee County with Associated Cities & Towns

Dorchester   52140
Harpers Ferry   52146
Lansing   52151
 New Albin   52160
Postville   52162
 Waterville   52170
Waukon   52172

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.