| Name | Address, Zip |
| United Government Security Officers Local 128 | 201 E Broadway St, 59802-4506 |
| Local 2457 International Association Of Firefighters | 2521 South Ave W, 59804-6407 |
| International Association Of Machinists & Aerospace Workers | Po Box 5622, 59806-5622 |
| International Association Of Machinists & Aerospace Workers | 5775 Us Highway 10 W, 59808-9535 |
| American Federation Of State County & Municiple Employees | 200 W Broadway St, 59802-4216 |
| American Federation Of Labor & Congress Of Industrial Orgs | Po Box 8122, 59807-8122 |
| American Federation Of Labor & Congress Of Industrial Orgs | 208 East Main, 59802-4427 |
| American Postal Workers Union | Po Box 2633, 59806-2633 |
| American Federation Of Government Employees | 26 Fort Missoula Rd, 59804-7203 |
| Brotherhood Of Locomotive Engineers And Trainmen | 208 E Main St Stop 2, 59802-4427 |
| United Association Of Journeymen & Apprentices Of The Plumbing & Pipe | 1026 S 5th St W, 59801-2428 |
| International Association Of Fire Fighters | 625 E Pine St, 59802-4633 |
| Brotherhood Of Maintenance Of Way Employees | 12312 Frenchtown Frontage Rd, 59808-9132 |
| National Treasury Employees Union | Po Box 8823, 59807-8823 |
| Unite Here | 208 E Main Street, 59802-4427 |
| Industrial Workers Of The World | 91 Campus Dr, 59801-4492 |
| Missoula Joint Pipe Trades Training Trust | 1026 S 5th St W, 59801-2428 |
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