| Business | Phone |
| American Postal Workers Union 180 N Diamond St, Mansfield 44902 | (419) 522-4348 |
| Brick Layers 821 Park Ave W, Mansfield 44906 | (419) 526-2646 |
| Carpenters 163 Poplar St, Mansfield 44903 | (419) 524-7091 |
| Carpenters Local 735 830 E Hanley Rd, Mansfield 44903 | (419) 524-2272 |
| Ibew 67 S Walnut St, Mansfield 44902 | (419) 529-5889 |
| Iue 30 E Cook Rd, Mansfield 44907 | (419) 756-8797 |
| Laborers 821 Park Ave W, Mansfield 44906 | (419) 524-5202 |
| Mansfield Area Electrical 67 S Walnut St, Mansfield 44902 | (419) 526-6330 |
| Teamsters Union 200 Wilmar Ave, Mansfield 44903 | (419) 522-2041 |
| United Auto Workers 2510 W 4th St, Mansfield 44906 | (419) 747-7655 |
| United Steelworkers Of America 1340 W 4th St, Mansfield 44906 | (419) 529-8792 |
| United Steelworkers Of America 376 Longview Ave W, Mansfield 44903 | (419) 522-9375 |
| United Steelworkers Union 328 E 1st St, Mansfield 44902 | (419) 525-3150 |