| Business | Phone |
| Afl-Cio 3601 Youngstown Rd Se, Warren 44484 | (330) 369-6042 |
| Afscme-Una 129 Fairmount Ave Ne, Warren 44483 | (330) 399-6990 |
| American Postal Workers Union 201 High St Ne, Warren 44481 | (330) 399-6909 |
| Bricklayers 746 Elm Rd Ne, Warren 44483 | (330) 394-9325 |
| Ibew 2430 Parkman Rd Nw, Warren 44485 | (330) 394-3606 |
| Iue Cwa Ge Aerospace 103 W Market St, Warren 44481 | (330) 373-1008 |
| Iue Cwa Local 717 2950 Sferra Ave Nw, Warren 44483 | (330) 392-1591 |
| Iue-Cwa Delphi Conference 103 W Market St, Warren 44481 | (330) 373-6308 |
| Iueafl-Cio Organization 103 W Market St # 105, Warren 44481 | (330) 399-1794 |
| Laborers International Union 465 W Market St, Warren 44481 | (330) 395-5105 |
| Ohio Lamp Local 2950 Sferra Ave Nw, Warren 44483 | (330) 395-8057 |
| Uaw 11471 Reuther Dr Sw, Warren 44481 | (330) 538-2213 |
| Uaw 2121 Salt Springs Rd, Warren 44481 | (330) 824-2527 |
| Uaw 49 G M Hallock Young Rd, Warren 44481 | (330) 824-2150 |
| Uaw 746 Elm Rd Ne, Warren 44483 | (330) 399-1914 |
| United Steelworkers Of America 684 N Park Ave, Warren 44483 | (330) 373-1375 |