Custer County, MT ZIP Codes
5 ZIP codes cover all or part of Custer County, Montana: 59301, 59336, 59351, 59338 and 59345. The Census Bureau counts 11,961 residents in the county, with a median household income of $70,605 and a median home value of $219,100. Its largest communities include Miles City and Ismay.
Custer County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 11,961 |
| Households | 5,038 |
| Median household income | $70,605 |
| Median home value | $219,100 |
| Median age | 42.7 |
| Median rent | $893 |
All 5 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 12,236 |
| Households (sum of ZIP codes) | 5,141 |
| Median household income, range across ZIP codes | $71,332 (59301) to $71,332 (59301) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $71,332 |
| Homeowners | 70.1% |
| Households with kids under 18 | 29.5% |
| Moved in the past year | 15.0% |
| Carrier routes in EDDM2GO's route library | 3 routes, 148 homes (2 of 5 ZIP codes) |
Every ZIP code in Custer County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 59301 | Miles City | 11,643 | 4,873 | $71,332 | $217,900 | 69.1% | 29.8% | 15.6% | — | — | 81% of its land |
| 59336 | Ismay | 220 | 81 | $64,375 | $293,200 | 80.2% | 40.7% | 0.5% | 2 | 86 | 65% of its land |
| 59351 | Volborg | 202 | 88 | — | $117,800 | 97.7% | 21.6% | 5.5% | — | — | 40% of its land |
| 59338 | Custer County | 136 | 81 | $69,375 | $337,100 | 85.2% | 17.3% | 5.9% | 1 | 64 | 100% of its land |
| 59345 | Custer County | 35 | 18 | $68,125 | $225,000 | 94.4% | 5.6% | 0.0% | — | — | 68% of its land |
A ZIP code is listed for Custer 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
- Miles City — 8,407 residents · 1 ZIP code
- Ismay — 1 residents · 1 ZIP code
Price a mailing to Custer County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Custer County, MT?
- 59301, 59336, 59351, 59338 and 59345. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Custer County?
- 11,961 residents in 5,038 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Custer County?
- $70,605 for the county as a whole. Its ZIP codes range from $71,332 (59301) to $71,332 (59301).
- How many carrier routes and mailboxes are in Custer County?
- For the 2 of 5 ZIP codes in EDDM2GO's stored route library: 3 carrier routes reaching 148 residential and 2 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.