| Business | Phone |
| Afl-Cio Pcwa 2201 White Blvd, Butte 59701 | (406) 494-8303 |
| American Postal Workers Union 1440 Holmes Ave, Butte 59701 | (406) 494-8222 |
| United Food & Commercial Wrkrs 58 W Quartz St, Butte 59701 | (406) 782-3266 |
| Butte Painters Union 156 W Granite St, Butte 59701 | (406) 782-2557 |
| Butte Teachers Union 156 W Granite St, Butte 59701 | (406) 723-6555 |
| Teamsters Union 3345 Harrison Ave, Butte 59701 | (406) 494-2747 |
| Carpenters Union 156 W Granite St, Butte 59701 | (406) 782-8542 |
| Cement Mason Po Box 965, Butte 59703 | (406) 782-3106 |
| Construction/Laborers 156 W Granite St, Butte 59701 | (406) 723-8102 |
| Operating Engineers Union 400 58 W Quartz St, Butte 59701 | (406) 723-7921 |
| Plumbers & Fitters No 41 Trng 45 E Silver St, Butte 59701 | (406) 723-4485 |
| Ibew 1901 S Montana St, Butte 59701 | (406) 723-3203 |
| Machinists Union District 156 W Granite St, Butte 59701 | (406) 723-8044 |