Boise County ZIP Codes

Boise County is a county of Idaho.

ZIP codes: 7
Cities & towns: 7
Area codes: 2
Land area: 1,899 sq mi

Every ZIP code in Boise County

836xx

The complete list of Boise County, ID ZIP codes with the city each one delivers to.
ZIP code	City
83602	Banks
83622	Garden Valley
83629	Horseshoe Bend
83631	Idaho City
83637	Lowman
83646	Meridian
83666	Placerville

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Boise County

A further 3 places in Boise 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 Boise County

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

Where Boise County's ZIP codes sit

Each point is the reference point of one Boise 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 Boise 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.