ZIP Code 59643

59643 is one of Montana's ZIP codes, delivering to addresses in Toston, Broadwater County.

City: Toston
County: Broadwater County
State: Montana
Prefix: 596xx

Where this code sits

59643 is part of the 596xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Toston.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59643 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59643

The ZIP codes whose reference points sit closest to 59643.
ZIP code	Distance	Delivers to
ZIP code 59641	3.3 mi	Radersburg, MT
ZIP code 59644	12 mi	Townsend, MT
ZIP code 59647	20 mi	Winston, MT
ZIP code 59752	20 mi	Three Forks, MT
ZIP code 59721	21 mi	Cardwell, MT
ZIP code 59638	25 mi	Jefferson City, MT
ZIP code 59632	25 mi	Boulder, MT
ZIP code 59760	27 mi	Willow 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 59643, plotted from its record coordinates.

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

Scope ZIP code 59643. 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.