Maine ZIP Codes

ZIP codes: 485
Cities & towns: 457
Counties: 16
Area codes: 1

How Maine ZIP codes are numbered

039xx–049xx

The first three digits identify the sectional center facility that processes mail for a region, so a Maine ZIP code can be placed geographically from its prefix alone. Each row names the city holding the most codes in that prefix.

Maine three-digit ZIP prefixes, the codes in each, and the city that holds the most of them.
Prefix	ZIP codes	Main area
039xx	11	Berwick
040xx	77	Freeport
041xx	15	Portland
042xx	60	Auburn
043xx	26	Augusta
044xx	68	Bangor
045xx	31	Alna
046xx	63	Addison
047xx	44	Limestone
048xx	20	Camden
049xx	70	New Portland

Where Maine's communities sit

Each point is a Maine community with a published ZIP code list, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Maine cities by ZIP code count

largest 25

Area codes serving Maine

207 Portland

Scope every ZIP code recorded in Maine. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. The map outline is a convex envelope of published places, not a state boundary.