ZIP Code 59058

59058 is one of Montana's ZIP codes, delivering to addresses in Mosby, Garfield County.

City: Mosby
County: Garfield County
State: Montana
Prefix: 590xx

Where this code sits

59058 is part of the 590xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mosby.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59058 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59058

The ZIP codes whose reference points sit closest to 59058.
ZIP code	Distance	Delivers to
ZIP code 59077	20 mi	Sand Springs, MT
ZIP code 59054	21 mi	Melstone, MT
ZIP code 59083	23 mi	Sumatra, MT
ZIP code 59087	25 mi	Winnett, MT
ZIP code 59039	30 mi	Ingomar, MT
ZIP code 59059	30 mi	Musselshell, MT
ZIP code 59318	44 mi	Brusett, MT
ZIP code 59038	49 mi	Hysham, 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 59058, plotted from its record coordinates.

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

Scope ZIP code 59058. 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.