ZIP Code 59923

59923 is one of Montana's ZIP codes, delivering to addresses in Libby, Lincoln County.

City: Libby
County: Lincoln County
State: Montana
Prefix: 599xx

Where this code sits

59923 is part of the 599xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Libby.

Libby Montana ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59923 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59923

The ZIP codes whose reference points sit closest to 59923.
ZIP code	Distance	Delivers to
ZIP code 59935	17 mi	Troy, MT
ZIP code 59853	25 mi	Noxon, MT
ZIP code 59844	29 mi	Heron, MT
ZIP code 83811	33 mi	Clark Fork, ID
ZIP code 83836	35 mi	Hope, ID
ZIP code 83845	39 mi	Moyie Springs, ID
ZIP code 83847	39 mi	Naples, ID
ZIP code 59874	39 mi	Trout Creek, MT

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 59923, plotted from its record coordinates.

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

Scope ZIP code 59923. 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.