Billings Area
| Name | Address | City | State | Zip |
|---|---|---|---|---|
| Billings Area Office | 2900 4th Avenue North | Billings | MT | 59101 |
| Blackfeet Service Unit | MT | |||
| Crow Service Unit | MT | |||
| Flat Head Service Unit | MT | |||
| Ft. Belknap Service Unit | MT | |||
| Ft. Peck Service Unit | P.O. Box 67 | Poplar | MT | 59255 |
| Northern Cheyenne Service Unit | MT | |||
| Rocky Boy Service Unit | MT | |||
| Wind River Service Unit | MT | |||
