Plain

City ZIP codes · Montana

Helena, MT ZIP Codes

8 ZIP codes use the postal name Helena, Montana (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 4 for PO boxes or a single organization. Median household income runs from $72,290 in 59601 to $92,985 in 59602, 1.3 times as much (Census Bureau, ACS 2020-2024). Helena's most populous ZIP code is 59601, with 31,728 people (ACS 2020-2024); 11% of its land is in the city of Helena.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Helena's ZIP codes?

59601: $72k median household income59602: $93k median household income59625: – median household income596025960159601: $72k median household income59602: $93k median household income59625: – median household income596025960159601: $72k median household income59602: $93k median household income59625: – median household income5960259601
The 4 residential ZIP codes named Helena, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Helena's ZIP codes?

The highest median household income is in 59602 ($92,985), the lowest in 59601 ($72,290). Home values run from $386,500 in 59601 to $408,600 in 59602.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 4 residential ZIP codes of Helena

Residential ZIP codes with the postal name Helena, MT, largest first (ACS 2020-2024); sort by any column
County
59601 Lewis and Clark County 31,728 244 $72k $387k
59602 Lewis and Clark County 30,754 59 $93k $409k
59625 Lewis and Clark County 663 7,286 – –
59623 Lewis and Clark County no residents 0 – –

Download the 8 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Helena

4 ZIP codes named Helena have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Helena, MT: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
59604Lewis and Clark County
59620Lewis and Clark County
59624Lewis and Clark County
59626Lewis and Clark County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Helena's ZIP codes reach?

Helena's residential ZIP codes lie in Lewis and Clark County.

Which places do Helena's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Helena's residential ZIP codes cover Helena itself and 8 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Helena Valley Northeast census-designated 59602
  • Helena Valley Northwest census-designated 59602
  • Helena Valley Southeast census-designated 59602
  • Helena Valley West Central census-designated 59602
  • Helena West Side census-designated 59601
  • Rimini census-designated 59601
  • Unionville census-designated 59601
  • York census-designated 59602

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Helena's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Helena starts with 596.

Three-digit prefixes of Helena's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Helena's
PrefixSectional centerHereAll codes
596 Great Falls, MT (SCF 594) 8 24

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.