| Theatre Company Of Portland | Portland | ME |
| Therapeutic Clinic Building | Togus | ME |
| Thomas H Sumner | South Portland | ME |
| Thomaston State Prison | Portland | ME |
| Todd Shipyard | Portland | ME |
| Topsham Air Force Station | Topsham | ME |
| Tree Free Fiber | Augusta | ME |
| Twitchell Champlin & Company | Portland | ME |
| Union Mutual Life Insurance Building | Portland | ME |
| United Gas & Electric | Portland | ME |
| United Paper Board | Fairfield | ME |
| United States Gypsum | Lisbon Falls | ME |
| University Of Maine | Orono | ME |
| VA Center | Togus | ME |
| Valksing | Easton | ME |
| Veneer Box & Panel | Greenville | ME |
| Veneer Products | Greenville | ME |
| Wass & Stinson Canning | Prospect Harbor | ME |
| Waterfalls Tissue | Mechanic Falls | ME |
| Water & Light Department | Lubec | ME |
| Water Works | Bangor | ME |
| Webber Hospital | Biddeford | ME |
| Western Fine Paper | Lincoln | ME |
| Westinghouse Electric & Manufacturing | Wiscasset | ME |
| West Point-Pepperell | Biddeford | ME |
| West Yard | Portland | ME |
| W.F. Wyman Power Plant | Yarmouth | ME |
| Whitneyville Mill | Whitneyville | ME |
| Willey Calhown | Portland | ME |
| Wilton Woolen | Winthrop | ME |
| Winslow & Company | Portland | ME |
| Winthrop Manufacturing | Winthrop | ME |
| W. L. Blake & Company | Portland | ME |
| Woodland Division | Woodland | ME |
| Worumbo Manufacturing | Lisbon Falls | ME |
| W.S. Libbey | Lewiston | ME |
| Wyandotte Worsted | Waterville | ME |
| YMCA | Waterville | ME |
| YMCA | Bath | ME |
| York Light & Heat | Biddeford | ME |
