ZIP Code 59636

59636 is one of Montana's ZIP codes, delivering to addresses in Fort Harrison, Lewis and Clark County.

City: Fort Harrison
County: Lewis and Clark County
State: Montana
Prefix: 596xx

Where this code sits

59636 is part of the 596xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fort Harrison.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59636 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59636

The ZIP codes whose reference points sit closest to 59636.
ZIP code	Distance	Delivers to
ZIP code 59625	3.5 mi	Helena, MT
ZIP code 59623	3.9 mi	Helena, MT
ZIP code 59620	4.0 mi	Helena, MT
ZIP code 59624	4.0 mi	Helena, MT
ZIP code 59626	4.0 mi	Helena, MT
ZIP code 59601	4.2 mi	Helena, MT
ZIP code 59604	7.5 mi	Helena, MT
ZIP code 59602	9.4 mi	Helena, 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 59636, plotted from its record coordinates.

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

Scope ZIP code 59636. 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.