ZIP Code 83854

83854 is one of Idaho's ZIP codes, delivering to addresses in Post Falls, Kootenai County.

City: Post Falls
County: Kootenai County
State: Idaho
Prefix: 838xx

Where this code sits

83854 is part of the 838xx range, the group of codes handled by one mail processing centre. Post Falls is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Post Falls page.

Post Falls Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83854 delivers to without sharing its boundary.

ZIP codes nearest 83854

The ZIP codes whose reference points sit closest to 83854.
ZIP code	Distance	Delivers to
ZIP code 83877	0.8 mi	Post Falls, ID
ZIP code 99025	6.0 mi	Newman Lake, WA
ZIP code 83815	6.8 mi	Coeur d'Alene, ID
ZIP code 83814	7.2 mi	Coeur d'Alene, ID
ZIP code 83858	7.5 mi	Rathdrum, ID
ZIP code 83816	7.8 mi	Coeur d'Alene, ID
ZIP code 99027	8.3 mi	Otis Orchards, WA
ZIP code 99019	8.4 mi	Liberty Lake, WA

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 83854, plotted from its record coordinates.

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

Scope ZIP code 83854. 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.