| ZIP Codes: | 11 ZIP Codes (10 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 406 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:12:55 PM |
| Population: | 7,450 [See All] |
| FIPS: | 30105 |
| Land Area: | 5,174 sq mi |
| Water Area: | 157 sq mi |
| Coordinates: | 48.4229, -106.4552 |
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7,450 residents live across 11 ZIPs covering 5,174 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 7,353 to 7,435 from 2014 to 2024 — a +1.1% change. 6 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 59244 (Larslan, $111,250 median) and poorest ZIP 59231 (Saint Marie , $38,971) are 18.3 miles apart — a 2.9× income gap across local geography.
Median home values vary 16.8× across this county — from $18,800 in 59231 (Saint Marie ) to $315,000 in 59260 (Richland).
Density varies 12× across the county — from 0 people/sq mi in 59260 (Richland) to 3 in 59230 (Glasgow).
Educational attainment ranges from 5.9% bachelor's+ in 59250 (Opheim) to 40.3% in 59260 (Richland) — the breadth of educational profiles across the area.
Within Montana, this is the #28 most populous of 56 counties and ranks #24 for median household income .
Weighted by population, the typical household earns about $77,089 across the county — reflecting what a typical resident sees, not a simple ZIP average.
25.8% of adults age 25+ hold a bachelor's degree or higher (1,374 of 5,316 reporting).
10 Standard delivery, 1 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.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 59230 | Glasgow | Standard | 4,606 | $85,000 | 1,630.3 | 0.3% |
| 59248 | Nashua | Standard | 1,023 | $89,821 | 567.6 | 63.7% |
| 59225 | Frazer | Standard | 639 | $43,594 | 336.2 | 19.4% |
| 59241 | Hinsdale | Standard | 439 | $48,512 | 1,289.9 | -4.8% |
| 59231 | Saint Marie | PO Box | 306 | $38,971 | 0.0 | -32.6% |
| 59250 | Opheim | Standard | 242 | $51,375 | 359.1 | 19.2% |
| 59260 | Richland | Standard | 76 | $85,313 | 324.1 | -30.3% |
| 59244 | Larslan | Standard | 63 | $111,250 | 206.8 | 43.2% |
| 59240 | Glentana | Standard | 22 | $58,750 | 26.1 | 100.0% |
| 59223 | Fort Peck | Standard | 19 | — | 328.3 | -94.1% |
| 59273 | Vandalia | Standard | 15 | — | 105.6 | — |