| Business | Phone |
| Labourer's International Union 1916 Pitt St #4, Cornwall K6J 5H3 | (613) 932-8588 |
| Plumbers Steam Fitters Union 2220 Vincent Massey Dr, Cornwall K6H 5R6 | (613) 932-6132 |
| United Steelworkers-America 80 Boundary Rd, Cornwall K6H 6M1 | (613) 938-4768 |
| Canadian Union Of Public Emply 20 Montreal Rd, Cornwall K6H 1B1 | (613) 933-5515 |
| Cep 205 Amelia St, Cornwall K6H 3P3 | (613) 938-2680 |
| Cupe 5 3rd St E, Cornwall K6H 2C6 | (613) 933-2959 |