Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/MT/COUNTY/CASCADE

Cascade County, MT ZIP codes

There are 18 ZIP codes in Cascade County, MT, in 14 towns, from 59401 to 59487. The largest are 59405 (Great Falls), 59404 (Great Falls) and 59401 (Great Falls).

The county seat is Great Falls.

ZIP codes
18
Towns
14
County seat
Great Falls
County FIPS
30013
State
Montana
Population
84,606
Median household income
$67,690
Land area
2,698 sq mi
Area code
406
Metro area
Great Falls

Cascade County ZIP codes by town

Great Falls (county seat)
59401, 59403, 59404, 59405, 59406

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Cascade County ZIP codes

594015940259403594045940559406594125941459421594435946359465594725947759480594835948559487

The ZIP codes of Cascade County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Cascade County in numbers

About 84,606 people live in Cascade County, in 35,615 households, the 5th most populous of Montana's 56 counties. The median household income is $67,690 a year, 7% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $265,300 (29% below the Montana median), and median gross rent is $939 a month. The median age is 38.6; 28.4% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 17 minutes.

Population84,606Cascade84,606
Households35,615Cascade35,615
Median age38.6Cascade38.6Montana40.4US 38.9
Median household income$67,690Cascade$67,690Montana$72,509US $80,734
Median home value$265,300Cascade$265,300Montana$375,800US $332,700
Median gross rent$939Cascade$939Montana$1,081US $1,413
Bachelor's degree or higher28.4%Cascade28.4%Montana35.2%US 35.7%
Mean commute16.5 minCascade16.5 minMontana19.1 minUS 26.4 min
Population density31 / sq miCascade31 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Cascade County

Largest towns in Cascade County
TownZIP codesPopulation
Great Falls 5 60,329
Malmstrom Afb 1 4,302
Vaughn 1 1,002
Ulm 1 900
Black Eagle 1 781
Cascade 1 572
Belt 1 559
Simms 1 334
Fort Shaw 1 207
Stockett 1 155
Sand Coulee 1 134
Sun River 1 72
Neihart 1 39
Monarch 1 22

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Cascade County.

Not sure you are in Cascade County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Cascade County, with figures

ZIP codes in Cascade County
ZIP City Type Population Median income Median home
59401 Great Falls , MT Standard 13,255 $55,299 $223,200
59402 Malmstrom Afb , MT No street area — — —
59403 Great Falls , MT No street area — — —
59404 Great Falls , MT Standard 28,822 $83,867 $295,700
59405 Great Falls , MT Standard 33,350 $59,449 $250,100
59406 Great Falls , MT No street area — — —
59412 Belt , MT Standard 1,685 $82,955 $250,700
59414 Black Eagle , MT Standard 781 $69,545 $190,400
59421 Cascade , MT Standard 2,069 $78,125 $377,900
59443 Fort Shaw , MT Standard 705 $81,221 $271,400
59463 Monarch , MT Standard 142 — $344,700
59465 Neihart , MT Standard 39 $83,000 $227,300
59472 Sand Coulee , MT Standard 507 $68,036 $235,300
59477 Simms , MT Standard 334 $42,292 $237,500
59480 Stockett , MT Standard 328 $80,714 $279,800
59483 Sun River , MT Standard 247 $97,813 $429,400
59485 Ulm , MT Standard 772 $90,286 $321,600
59487 Vaughn , MT Standard 1,548 $56,359 $229,300

Cite this page

zipcodes.pro. “Cascade County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/cascade

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