ZIP Code 04858

04858 is one of Maine's ZIP codes, delivering to addresses in South Thomaston, Knox County.

City: South Thomaston
County: Knox County
State: Maine
Prefix: 048xx

Where this code sits

04858 is part of the 048xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to South Thomaston.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 04858 delivers to without sharing its boundary.

207 Area code 207

ZIP codes nearest 04858

The ZIP codes whose reference points sit closest to 04858.
ZIP code	Distance	Delivers to
ZIP code 04859	2.6 mi	Spruce Head, ME
ZIP code 04854	3.4 mi	Owls Head, ME
ZIP code 04861	4.2 mi	Thomaston, ME
ZIP code 04841	5.3 mi	Rockland, ME
ZIP code 04860	7.4 mi	Tenants Harbor, ME
ZIP code 04563	7.6 mi	Cushing, ME
ZIP code 04864	8.3 mi	Warren, ME
ZIP code 04855	9.6 mi	Port Clyde, 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 04858, plotted from its record coordinates.

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

Scope ZIP code 04858. 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.