| Business | Phone |
| Harrowsmith Public School 4121 Colebrook Rd, Harrowsmith K0H 1V0 | (613) 372-2026 |
| Outdoor Education Ctr 4121 Colebrook Rd, Harrowsmith K0H 1V0 | (613) 372-1442 |
| South Frontenac Learning Ctr 5597 Highway 38, Harrowsmith K0H 1V0 | (613) 372-2111 |
| St Patrick School 3889 Wilton Rd, Harrowsmith K0H 1V0 | (613) 372-2251 |