ZIP Code 83605

83605 is one of Idaho's ZIP codes, delivering to addresses in Caldwell, Canyon County.

City: Caldwell
County: Canyon County
State: Idaho
Prefix: 836xx

Where this code sits

83605 is part of the 836xx range, the group of codes handled by one mail processing centre. Caldwell is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Caldwell page.

Caldwell Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83605 delivers to without sharing its boundary.

ZIP codes nearest 83605

The ZIP codes whose reference points sit closest to 83605.
ZIP code	Distance	Delivers to
ZIP code 83607	3.9 mi	Caldwell, ID
ZIP code 83652	5.0 mi	Nampa, ID
ZIP code 83644	5.9 mi	Middleton, ID
ZIP code 83653	6.0 mi	Nampa, ID
ZIP code 83630	6.1 mi	Huston, ID
ZIP code 83606	6.5 mi	Caldwell, ID
ZIP code 83626	6.6 mi	Greenleaf, ID
ZIP code 83656	6.6 mi	Notus, 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 83605, plotted from its record coordinates.

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

Scope ZIP code 83605. 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.