| Business | Phone |
| Ontario Public Svc Union 291 Woodlawn Rd W #3c, Guelph N1H 7L6 | (519) 837-3330 |
| Canadian Auto Workers Local 50 Crimea St, Guelph N1H 2Y6 | (519) 836-7561 |
| Canadian Auto Workers 611 Silvercreek Pky N, Guelph N1H 6J2 | (519) 822-6121 |
| Canadian Union Of Public Empls University Ctr #348, Guelph N1G 2W1 | (519) 836-5470 |
| Canadian Union Of Postal Wrkrs 5 Douglas St, Guelph N1H 2S8 | (519) 824-5172 |
| Cupe 100 Crimea St, Guelph N1H 2Y6 | (519) 826-9515 |