Carbon County ZIP Codes

Carbon County is a county of Montana.

ZIP codes: 10
Cities & towns: 10
Area codes: 1
Land area: 2,048 sq mi

Every ZIP code in Carbon County

590xx

The complete list of Carbon County, MT ZIP codes with the city each one delivers to.
ZIP code	City
59007	Bearcreek
59008	Belfry
59013	Boyd
59014	Bridger
59026	Edgar
59029	Fromberg
59041	Joliet
59068	Red Lodge
59070	Roberts
59071	Roscoe

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Carbon County codes above are listed without a column we would have to invent.

Cities and towns in Carbon County

A further 5 places in Carbon County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Carbon County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

406 Area code 406

Where Carbon County's ZIP codes sit

Each point is the reference point of one Carbon County ZIP code, 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

Scope every ZIP code recorded in Carbon County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.