ZIP Code 04259

04259 is one of Maine's ZIP codes, delivering to addresses in Monmouth, Kennebec County.

City: Monmouth
County: Kennebec County
State: Maine
Prefix: 042xx

Where this code sits

04259 is part of the 042xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Monmouth.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 04259 delivers to without sharing its boundary.

207 Area code 207

ZIP codes nearest 04259

The ZIP codes whose reference points sit closest to 04259.
ZIP code	Distance	Delivers to
ZIP code 04265	3.8 mi	North Monmouth, ME
ZIP code 04350	5.2 mi	Litchfield, ME
ZIP code 04236	6.3 mi	Greene, ME
ZIP code 04263	6.5 mi	Leeds, ME
ZIP code 04280	7.8 mi	Sabattus, ME
ZIP code 04364	7.8 mi	Winthrop, ME
ZIP code 04284	9.2 mi	Wayne, ME
ZIP code 04343	9.5 mi	East Winthrop, 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 04259, plotted from its record coordinates.

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

Scope ZIP code 04259. 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.