ZIP 59101 falls in Yellowstone County, Montana, where we hold 82 septic-related documents. We have not classified septic-versus-sewer status for this county, and we do not have a per-ZIP parcel count -- see the county page for what we hold and where the records are kept.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Yellowstone County, Montana | 98% | 82 | — | — |
4 businesses on record with an address in this ZIP: pumping, installation, design, inspection and repair. Not an endorsement, and we take no fee.
| Company | City | Phone | Rating |
|---|---|---|---|
| TLC Patriot Septic & Excavation Services | Billings | (406) 633-4333 | 5.0 (5) |
| A-1 Yellowstone Sewer | Billings | (406) 248-2962 | 5.0 (1) |
| Bangert Construction & Excavation | Billings | (406) 294-5111 | — |
| The DrainMasters | Billings | (406) 252-3233 | — |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We have not measured septic-versus-sewer status for this county yet.
ZIP 59101 falls in Yellowstone County, Montana.