Plain

City ZIP codes · Montana

Great Falls, MT ZIP Codes

5 ZIP codes use the postal name Great Falls, Montana (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 3 residential and 2 for PO boxes or a single organization. Median household income runs from $55,299 in 59401 to $83,867 in 59404, 1.5 times as much (Census Bureau, ACS 2020-2024). Great Falls's most populous ZIP code is 59405, with 33,350 people (ACS 2020-2024); 0% of its land is in the city of Great Falls.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Great Falls's ZIP codes?

59401: $55k median household income59404: $84k median household income59405: $59k median household income594055940459401: $55k median household income59404: $84k median household income59405: $59k median household income594055940459401: $55k median household income59404: $84k median household income59405: $59k median household income5940559404
The 3 residential ZIP codes named Great Falls, 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 Great Falls's ZIP codes?

The highest median household income is in 59404 ($83,867), the lowest in 59401 ($55,299). Home values run from $223,200 in 59401 to $295,700 in 59404.

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

All 3 residential ZIP codes of Great Falls

Residential ZIP codes with the postal name Great Falls, MT, largest first (ACS 2020-2024); sort by any column
County
59405 Cascade County 33,350 70 $59k $250k
59404 Cascade County 28,822 87 $84k $296k
59401 Cascade County 13,255 4,478 $55k $223k

Download the 5 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 Great Falls

2 ZIP codes named Great Falls 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.

Great Falls, 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
59403Cascade County
59406Cascade County

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

Which counties do Great Falls's ZIP codes reach?

Great Falls's residential ZIP codes lie in 2 counties: Cascade County (3 ZIP codes mainly there), Chouteau County (part of a ZIP code).

Which places do Great Falls's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Great Falls's residential ZIP codes cover Great Falls itself and 3 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Gibson Flats census-designated 59405
  • Malmstrom AFB census-designated 59405
  • Sun Prairie census-designated 59404

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

Which first three digits do Great Falls'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 Great Falls starts with 594.

Three-digit prefixes of Great Falls'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 Great Falls's
PrefixSectional centerHereAll codes
594 Great Falls, MT (SCF 594) 5 64

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