Zip Code 59230 — Glasgow, MT
59230 is a ZIP Code associated with Glasgow, MT, located within Valley. 59230 ranks #1 out of 10 ZIP codes in Valley County by population (and #51 out of 369 in MT). The area supports an estimated population of 4,606 residents across Data Pending housing units, with a population density of 1.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (48.099920, -106.801960)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 59230 |
| Primary City | Glasgow |
| State / Province | MT |
| County | Valley |
| Total Population | 4,606 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1.2 people/sq mi |
| Timezone | America/Denver |
How 59230 Compares
| Metric | ZIP 59230 | Valley County | MT State Average |
|---|
| Population | 4,606 | 7,431 (Total) | 1,117,606 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1.2 /sq mi | -- | -- |
| County Pop Rank | #1 of 10 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →