| Business | Phone |
| Ontario Environment & Energy 113 Amelia St, Cornwall K6H 3P1 | (613) 933-7402 |
| Legal Aid Ontario 119 Sydney St, Cornwall K6H 3H1 | (613) 932-4756 |
| Licence Bureau 55 Water St W, Cornwall K6J 1A1 | (613) 933-7239 |
| Ontario Enforcement Office 29 2nd St W, Cornwall K6J 1G3 | (613) 933-7500 |
| Ontario Bureaux D'Enregistre 127 Sydney St, Cornwall K6H 3H1 | (613) 932-4522 |
| Ontario Centre D'Information 903 Brookdale Ave, Cornwall K6J 4P3 | (613) 933-2420 |
| Ontario Community Svc Dept 4 Montreal Rd, Cornwall K6H 1B1 | (613) 932-3381 |
| Ontario Correctional Svc Dept 4 Montreal Rd, Cornwall K6H 1B1 | (613) 938-1581 |
| Ontario Correctional Svc Dept 331 Pitt St, Cornwall K6J 3R1 | (613) 933-6335 |
| Ontario Deputes Provinciaux 404 Montreal Rd, Cornwall K6H 1B7 | (613) 933-6513 |
| Ontario Procureur-La Couronne 29 2nd St W, Cornwall K6J 1G3 | (613) 932-5903 |
| Community Care Access Ctr 709 Cotton Mill St, Cornwall K6H 7K7 | (613) 936-1171 |