| Business | Phone |
| Adult Education 3 Highland Ave, Winthrop 4364 | (207) 377-2265 |
| Winthrop Grade School 11 Highland Ave, Winthrop 4364 | (207) 377-2241 |
| Winthrop High School 11 Highland Ave, Winthrop 4364 | (207) 377-2228 |
| Winthrop Middle School 400 Rambler Rd, Winthrop 4364 | (207) 377-2249 |
| Winthrop Superintendent-School 57 Main St, Winthrop 4364 | (207) 377-2296 |