| Business | Phone |
| Calais Children's Project 51 Palmer St, Calais 4619 | (207) 454-8163 |
| Calais Elementary School 53 Garfield St, Calais 4619 | (207) 454-2000 |
| Calais High School River Rd, Calais 4619 | (207) 454-2591 |
| Calais Middle School 11 Washington St, Calais 4619 | (207) 454-7126 |
| Calais Superintendent-Schools 32 Blue Devil Hl, Calais 4619 | (207) 454-7561 |
| Headstart-St Croix 37 Garfield St, Calais 4619 | (207) 454-3212 |
| Maine Indian Edu Schl District 19 Gatcomb Dr, Calais 4619 | (207) 454-2126 |
| St Croix Reginal Tech Center River Rd, Calais 4619 | (207) 454-2581 |