Petroleum County, MT ZIP Codes
3 ZIP codes cover all or part of Petroleum County, Montana: 59032, 59087 and 59058. The Census Bureau counts 447 residents in the county, with a median household income of $60,208 and a median home value of $201,400. Median household income ranges from $42,000 in 59032 to $62,813 in 59087. Its largest communities include Winnett.
Petroleum County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 447 |
| Households | 221 |
| Median household income | $60,208 |
| Median home value | $201,400 |
| Median age | 51.6 |
| Median rent | $800 |
All 3 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 858 |
| Households (sum of ZIP codes) | 433 |
| Median household income, range across ZIP codes | $42,000 (59032) to $62,813 (59087) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $52,081 |
| Homeowners | 73.4% |
| Households with kids under 18 | 15.0% |
| Moved in the past year | 12.4% |
| Carrier routes in EDDM2GO's route library | 3 routes, 89 homes (2 of 3 ZIP codes) |
Every ZIP code in Petroleum County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 59032 | Grass Range | 409 | 214 | $42,000 | $150,000 | 72.0% | 11.7% | 12.7% | 1 | 56 | 23% of its land |
| 59087 | Winnett | 395 | 201 | $62,813 | $195,300 | 72.6% | 18.4% | 13.8% | — | — | 100% of its land |
| 59058 | Garfield County | 54 | 18 | — | $250,000 | 100.0% | 16.7% | 0.0% | 2 | 37 | 26% of its land |
A ZIP code is listed for Petroleum County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Winnett — 204 residents · 1 ZIP code
Price a mailing to Petroleum County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Petroleum County, MT?
- 59032, 59087 and 59058. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Petroleum County?
- 447 residents in 221 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Petroleum County?
- $60,208 for the county as a whole. Its ZIP codes range from $42,000 (59032) to $62,813 (59087).
- How many carrier routes and mailboxes are in Petroleum County?
- For the 2 of 3 ZIP codes in EDDM2GO's stored route library: 3 carrier routes reaching 89 residential and 4 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.