ZIP Code 59477

59477 is one of Montana's ZIP codes, delivering to addresses in Simms, Cascade County.

City: Simms
County: Cascade County
State: Montana
Prefix: 594xx

Where this code sits

59477 is part of the 594xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Simms.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59477 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59477

The ZIP codes whose reference points sit closest to 59477.
ZIP code	Distance	Delivers to
ZIP code 59443	3.6 mi	Fort Shaw, MT
ZIP code 59483	7.6 mi	Sun River, MT
ZIP code 59436	9.8 mi	Fairfield, MT
ZIP code 59468	15 mi	Power, MT
ZIP code 59487	15 mi	Vaughn, MT
ZIP code 59421	16 mi	Cascade, MT
ZIP code 59485	17 mi	Ulm, MT
ZIP code 59410	24 mi	Augusta, 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 59477, plotted from its record coordinates.

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

Scope ZIP code 59477. 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.