ZIP Code 04978

04978 is one of Maine's ZIP codes, delivering to addresses in Smithfield, Somerset County.

City: Smithfield
County: Somerset County
State: Maine
Prefix: 049xx

Where this code sits

04978 is part of the 049xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smithfield.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 04978 delivers to without sharing its boundary.

207 Area code 207

ZIP codes nearest 04978

The ZIP codes whose reference points sit closest to 04978.
ZIP code	Distance	Delivers to
ZIP code 04957	4.3 mi	Norridgewock, ME
ZIP code 04937	6.4 mi	Fairfield, ME
ZIP code 04903	7.3 mi	Waterville, ME
ZIP code 04918	8.2 mi	Belgrade Lakes, ME
ZIP code 04963	8.5 mi	Oakland, ME
ZIP code 04944	8.9 mi	Hinckley, ME
ZIP code 04955	10 mi	New Sharon, ME
ZIP code 04901	11 mi	Waterville, 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 04978, plotted from its record coordinates.

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

Scope ZIP code 04978. 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.