ZIP Code 83631

83631 is one of Idaho's ZIP codes, delivering to addresses in Idaho City, Boise County.

City: Idaho City
County: Boise County
State: Idaho
Prefix: 836xx

Where this code sits

83631 is part of the 836xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Idaho City.

Idaho City Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83631 delivers to without sharing its boundary.

ZIP codes nearest 83631

The ZIP codes whose reference points sit closest to 83631.
ZIP code	Distance	Delivers to
ZIP code 83666	14 mi	Placerville, ID
ZIP code 83622	16 mi	Garden Valley, ID
ZIP code 83637	18 mi	Lowman, ID
ZIP code 83601	23 mi	Atlanta, ID
ZIP code 83629	24 mi	Horseshoe Bend, ID
ZIP code 83602	25 mi	Banks, ID
ZIP code 83716	28 mi	Boise, ID
ZIP code 83712	30 mi	Boise, ID

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 83631, plotted from its record coordinates.

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

Scope ZIP code 83631. 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.