| Business | Phone |
| Sweet Grass County Ambulance 15 Hooper St, Big Timber 59011 | (406) 932-5384 |
| Sweet Grass County Extension 515 Hooper, Big Timber 59011 | (406) 932-5146 |
| Sweet Grass County Planning 200 W 1st Ave, Big Timber 59011 | (406) 932-5470 |
| Sweet Grass County Recorder 200 W 1st Ave, Big Timber 59011 | (406) 932-5152 |
| Sweet Grass County Sanitarian 200 W 1st Ave, Big Timber 59011 | (406) 932-5395 |
| Sweet Grass Justice-The Peace 200 W 1st Ave, Big Timber 59011 | (406) 932-5150 |