Maine - Area of significance: Community Planning
| Androscoggin Swinging Bridge |
| Anson Grange #88 |
| Archeological Site No. 29-64 |
| Auburn-Harpswell Association Historic District |
| Bangor House |
| Bates Mill Historic District |
| Brunswick Square |
| Calais Residential Historic District |
| Camden Great Fire Historic District |
| Cape Arundel Summer Colony Historic District |
| Cherryfield Historic District |
| Chestnut Street Historic District |
| Clapp, Charles Q., House |
| Common, The |
| Cumberland and Oxford Canal |
| Cumberland Mills Historic District |
| Dudley Block |
| East Blue Hill Post Office |
| Eastern Cemetery |
| East Main Street Historic District |
| Everett Chambers |
| Franklin Towers |
| Free Baptist Church of Great Pond, The |
| Freeport Main Street Historic District |
| Frisbee, Frank C., Elementary School |
| Gorham Historic District |
| Grand, The |
| Great Falls Historic District |
| Great Fire of 1911 Historic District |
| Hamblen Development Historic District |
| Harbor Lane-Eden Street Historic District |
| High Street Historic District |
| Hinckley Hill Historic District |
| Hodgkins, Ella R., Intermediate School |
| Jordan, F.M., House |
| Lewiston Commercial Historic District |
| Lewiston Mills and Water Power System Historic District |
| Limington Historic District |
| Lower Alewive Historic District |
| Low, Joseph W., House |
| Lucerne Inn |
| Main Street-Frye Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Mount Desert Island Hiking Trail System |
| Mount Hope Cemetery District |
| Ogunquit Playhouse |
| Olmsted, Frederick Law, Summer Home |
| Orono Main Street Historic District |
| Park Street Row |
| Portland Observatory |
| Portland Waterfront |
| Rackleff Building |
| Rumford Commercial Historic District |
| Rumford Falls Paper Company Historic District |
| Saco Central Fire Station |
| Saco Historic District |
| Sagamore Village Historic District |
| Saint Saviour's Episcopal Church and Rectory |
| Sanford Mills Historic District |
| Schoodic Peninsula Historic District |
| Sedgwick Historic District |
| Sorrento Library |
| Southard Block |
| South Berwick Village Historic District |
| Standish Corner Historic District |
| Strathglass Park District |
| Swan Island Historic District |
| Thomas B. Reed School |
| Thompson Block |
| Trufant Historic District |
| U.S. Courthouse |
| Washington Park Historic District |
| Waterville Main Street Historic District |
| Waterville Main Street Historic District |
| Western Promenade Historic District |
| Whitney Park Historic District |
| Winthrop Street Historic District |
| Woodman Building |
Data from United States Park Service and Wikidata
