ZIP Code 59420

59420 is one of Montana's ZIP codes, delivering to addresses in Carter, Chouteau County.

City: Carter
County: Chouteau County
State: Montana
Prefix: 594xx

Where this code sits

59420 is part of the 594xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Carter.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59420 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59420

The ZIP codes whose reference points sit closest to 59420.
ZIP code	Distance	Delivers to
ZIP code 59440	11 mi	Floweree, MT
ZIP code 59450	16 mi	Highwood, MT
ZIP code 59406	17 mi	Great Falls, MT
ZIP code 59442	20 mi	Fort Benton, MT
ZIP code 59414	22 mi	Black Eagle, MT
ZIP code 59401	23 mi	Great Falls, MT
ZIP code 59405	24 mi	Great Falls, MT
ZIP code 59402	25 mi	Malmstrom Afb, 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 59420, plotted from its record coordinates.

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

Scope ZIP code 59420. 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.