Maine - Constructed - 1800–1809
| Academy Building |
| Auld-McCobb House |
| Blossom House |
| Bussey, Louis I., School |
| Coffin, Stephen, House |
| Fort McClary |
| Gates House |
| Hampden Academy |
| Leach, Philip, House |
| Lermond Mill |
| Ludwig, Godfrey, House |
| Maxcy, Joseph and Hannah, Homestead |
| Mitchell House |
| Parson's Bend |
| Parsons, Stephen, House |
| Portland Observatory |
| Portsmouth Naval Shipyard |
| Quimby, Dr. Samuel, House |
| Randall-Hildreth House |
| Randall, Jacob, House |
| Wallingford Hall |
| West Quoddy Head Light Station |
| Whitehead Light Station |
| Wood Island Light Station |
Data from United States Park Service and Wikidata
