ZIP Code 59604

59604 is one of Montana's ZIP codes, delivering to addresses in Helena, Lewis and Clark County.

City: Helena
County: Lewis and Clark County
State: Montana
Prefix: 596xx

Where this code sits

59604 is part of the 596xx range, the group of codes handled by one mail processing centre. Helena is served by 8 ZIP codes in total; the full list, with the county each falls in, is on the Helena page.

Helena Montana ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 59604 delivers to without sharing its boundary.

406 Area code 406

ZIP codes nearest 59604

The ZIP codes whose reference points sit closest to 59604.
ZIP code	Distance	Delivers to
ZIP code 59602	2.8 mi	Helena, MT
ZIP code 59601	4.5 mi	Helena, MT
ZIP code 59625	5.7 mi	Helena, MT
ZIP code 59635	5.7 mi	East Helena, MT
ZIP code 59620	6.1 mi	Helena, MT
ZIP code 59624	6.1 mi	Helena, MT
ZIP code 59626	6.1 mi	Helena, MT
ZIP code 59623	6.3 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 59604, plotted from its record coordinates.

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

Scope ZIP code 59604. 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.