Gem County ZIP Codes

Gem County is a county of Idaho.

ZIP codes: 4
Cities & towns: 4
Area codes: 2
Land area: 560 sq mi

Every ZIP code in Gem County

836xx

The complete list of Gem County, ID ZIP codes with the city each one delivers to.
ZIP code	City
83617	Emmett
83636	Letha
83657	Ola
83670	Sweet

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Gem County codes above are listed without a column we would have to invent.

Cities and towns in Gem County

A further 3 places in Gem 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 Gem County

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

Where Gem County's ZIP codes sit

Each point is the reference point of one Gem 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 Gem 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.