| ZIP Codes: | 18 ZIP Codes (14 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Code: | 406 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:12:52 PM |
| Population: | 84,584 [See All] |
| FIPS: | 30013 |
| CBSA: | Great Falls, MT |
| Land Area: | 2,851 sq mi |
| Water Area: | 12 sq mi |
| Coordinates: | 47.3811, -111.3497 |
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84,584 residents live across 18 ZIPs covering 2,851 sq mi, served by 14 distinct USPS-recognized cities.
Population moved from 82,089 to 84,584 from 2014 to 2024 — a +3.0% change. 7 ZIPs gained residents, 8 lost.
The county's wealthiest ZIP 59485 (Ulm, $90,286 median) and poorest ZIP 59401 (Great Falls, $55,299) are 14.6 miles apart — a 1.6× income gap across local geography.
Median home values vary 2.0× across this county — from $190,400 in 59414 (Black Eagle) to $377,900 in 59421 (Cascade).
Density varies 1562× across the county — from 2 people/sq mi in 59421 (Cascade) to 3,771 in 59401 (Great Falls).
Educational attainment ranges from 13.7% bachelor's+ in 59487 (Vaughn) to 37.6% in 59412 (Belt) — the breadth of educational profiles across the area.
Within Montana, this is the #5 most populous of 56 counties and ranks #15 for median household income .
Weighted by population, the typical household earns about $68,748 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.4% of adults age 25+ hold a bachelor's degree or higher (16,536 of 58,250 reporting).
14 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 59405 | Great Falls | Standard | 33,350 | $59,449 | 496.0 | 9.3% |
| 59404 | Great Falls | Standard | 28,822 | $83,867 | 240.9 | 5.3% |
| 59401 | Great Falls | Standard | 13,255 | $55,299 | 3.5 | -7.5% |
| 59421 | Cascade | Standard | 2,069 | $78,125 | 857.0 | 12.4% |
| 59412 | Belt | Standard | 1,685 | $82,955 | 367.1 | 9.5% |
| 59487 | Vaughn | Standard | 1,548 | $56,359 | 57.1 | 2.2% |
| 59414 | Black Eagle | Standard | 781 | $69,545 | 1.9 | -36.7% |
| 59485 | Ulm | PO Box | 772 | $90,286 | 53.3 | 48.2% |
| 59443 | Fort Shaw | Standard | 705 | $81,221 | 96.3 | -13.8% |
| 59472 | Sand Coulee | Standard | 507 | $68,036 | 53.5 | -38.5% |
| 59477 | Simms | PO Box | 334 | $42,292 | 51.6 | -32.4% |
| 59480 | Stockett | Standard | 328 | $80,714 | 128.9 | -34.0% |
| 59483 | Sun River | Standard | 247 | $97,813 | 81.4 | -40.9% |
| 59463 | Monarch | Standard | 142 | — | 241.3 | 25.7% |
| 59465 | Neihart | Standard | 39 | $83,000 | 116.5 | -26.4% |
| 59406 | Great Falls | PO Box | — | — | 0.0 | — |
| 59402 | Malmstrom Afb | Standard | — | — | 4.1 | — |
| 59403 | Great Falls | PO Box | — | — | 0.0 | — |