| Business | Phone |
| Afscme Indiana Council 2222 W Ridge Rd, Gary 46408 | (219) 985-2618 |
| Gary Teachers Union 1401 Virginia St, Gary 46407 | (219) 886-7320 |
| Genl Drivers Warehousemen 1300 Clark Rd, Gary 46404 | (219) 949-1550 |
| Service Employees Intl Union 3750 Hayes St, Gary 46408 | (219) 884-4901 |
| Teamsters Union 1300 Clark Rd, Gary 46404 | (219) 944-6270 |
| Teamsters Union Local 364 2405 Edison St, Gary 46406 | (574) 674-5231 |
| United Steelworkers Of America 1221 E Ridge Rd, Gary 46409 | (219) 887-0594 |
| Us Wa Local Union 1301 Texas St # 129, Gary 46402 | (219) 881-0654 |
| Uswa 1301 Texas St, Gary 46402 | (219) 886-9224 |