County ZIP codes · Montana · FIPS 30037
Golden Valley County, MT ZIP Codes
Golden Valley County, Montana has 3 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 2 of the residential ones lie mainly in Golden Valley County and 1 mainly in a neighboring county; 3 cross the county line.
- ACS2020-24
- Census2020
Where are the ZIP codes of Golden Valley County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 3 residential ZIP codes in Golden Valley County
2 ZIP codes lie mainly in Golden Valley County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 59046 | Lavina | 577 | 1 | $74k | $211k | 92% |
| 59074 | Ryegate | 413 | 1 | $50k | $169k | 91% |
Partly in Golden Valley County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 59078 | Shawmut | 115 | 0 | $27k | $142k | 22% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
3 ZIP codes of Golden Valley County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Golden Valley | Elsewhere |
|---|---|---|
| 59046 | 92% | Musselshell County8% |
| 59074 | 91% | Stillwater County7%; Wheatland County2% |
| 59078 | 22% | Wheatland County69%; Sweet Grass County8% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Golden Valley County'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 Golden Valley County starts with 590.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 590 | Billings, MT (SCF 590) | 3 | 75 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.