| Business | Phone |
| Amalgamated Transit Union 294 Aylmer St N #6, Peterborough K9J 3K7 | (705) 743-8636 |
| Canadian Auto Workers Local 140 Braidwood Ave, Peterborough K9J 1T8 | (705) 742-5113 |
| Independent Union Of Precision 178 Sophia St, Peterborough K9H 1E5 | (705) 745-6428 |
| Ontario Public Svc Emplys 1789 Stenson Blvd #4, Peterborough K9K 2H4 | (705) 748-9100 |
| Peterborough & District Labour 294 Aylmer St N, Peterborough K9J 3K7 | (705) 742-9286 |
| Sheet Metal Workers Local 392 292 Brock St, Peterborough K9H 2R1 | (705) 748-5911 |
| United Steel Wrkrs Of America 294 Aylmer St N, Peterborough K9J 3K7 | (705) 742-8111 |
| Canadian Auto Workers 203 Park St N, Peterborough K9J 3P7 | (705) 741-0614 |
| Canadian Union Postal Workers 294 Aylmer St N, Peterborough K9J 3K7 | (705) 742-3513 |
| Canadian Union Of Public Empys 140 King St #500, Peterborough K9J 7Z8 | (705) 743-0600 |
| Cupe 2155 Davis Dr, Peterborough K9J 7A5 | (705) 742-5356 |