Maine counties
Every county in Maine, with the ZIP codes recorded in each. Pick one to see its full ZIP code list.
- counties
- 16
- ZIP codes
- 485
All Maine counties
| County | ZIP codes | Largest city |
|---|---|---|
| Androscoggin County | 24 | Auburn |
| Aroostook County | 44 | Limestone |
| Cumberland County | 52 | Portland |
| Franklin County | 20 | Dryden |
| Hancock County | 43 | Castine |
| Kennebec County | 34 | Augusta |
| Knox County | 20 | Camden |
| Lincoln County | 28 | Alna |
| Oxford County | 32 | Andover |
| Penobscot County | 47 | Bangor |
| Piscataquis County | 12 | Abbot |
| Sagadahoc County | 9 | Bath |
| Somerset County | 26 | New Portland |
| Waldo County | 20 | Belfast |
| Washington County | 32 | Addison |
| York County | 42 | Biddeford |
Scope every county-equivalent recorded in Maine. Source Census 2024 county Gazetteer (2024 Gazetteer) and GeoNames US postal codes (2026-07 postal dump). Updated . Names and boundaries follow the Census Bureau's current county-equivalent set, not the ME postal source's older names.