ZIP Code 04257

04257 is one of Maine's ZIP codes, delivering to addresses in Mexico, Oxford County.

City: Mexico
County: Oxford County
State: Maine
Prefix: 042xx

Where this code sits

04257 is part of the 042xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mexico.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 04257 delivers to without sharing its boundary.

207 Area code 207

ZIP codes nearest 04257

The ZIP codes whose reference points sit closest to 04257.
ZIP code	Distance	Delivers to
ZIP code 04276	1.9 mi	Rumford, ME
ZIP code 04224	5.5 mi	Dixfield, ME
ZIP code 04290	6.6 mi	Peru, ME
ZIP code 04275	7.4 mi	Roxbury, ME
ZIP code 04226	8.6 mi	East Andover, ME
ZIP code 04237	10 mi	Hanover, ME
ZIP code 04285	11 mi	Weld, ME
ZIP code 04227	11 mi	East Dixfield, ME

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 04257, plotted from its record coordinates.

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

Scope ZIP code 04257. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.