Maine - Area of significance: Commerce
| Adams-Pickering Block |
| Allen's Island |
| Anderson Bros. Store |
| Anson Grange #88 |
| Auburn Commercial Historic District |
| Bangor House |
| Bath Historic District |
| Belfast Commercial Historic District |
| Belfast Historic District |
| Belfast National Bank |
| Biddeford Main Street Historic District |
| Black Horse Tavern |
| Blue Hill Historic District |
| Browns Head Light Station |
| Brunswick Commercial Historic District |
| Building at 84-96 Hammond Street |
| Burnell Tavern |
| Calais Historic District |
| Camden Great Fire Historic District |
| Carrabasset Inn |
| Castine Historic District |
| Chandler Store |
| Cherryfield Historic District |
| China Village Historic District |
| Claremont Hotel |
| Coburn, Gov. Abner, House |
| College Club Inn |
| Columbia House |
| CORA F. CRESSEY |
| Cottrill, Matthew, House |
| Crooker, W. D., House |
| Cumberland and Oxford Canal |
| Curtis Island Light |
| Cushnoc (ME 021.02) |
| Dark Harbor Shop |
| Dover-Foxcroft Commercial Historic District |
| Dudley Block |
| East Machias Historic District |
| Eastport Historic District |
| Falmouth House |
| Far From the Wolf |
| Farmington Historic District |
| Farwell Brothers Store |
| Fitch's General Store and House |
| Fletcher's Neck Lifesaving Station |
| Fort Western |
| Foster-Redington House |
| Fowler, Jeremiah, House |
| Gardiner Historic District |
| Gates House |
| Georges River Canal |
| Gerald Hotel |
| Glidden-Austin Block |
| Goddard Site |
| Gorham Historic District |
| Granite Store |
| Grant, Peter, House |
| Great Fire of 1911 Historic District |
| Greenough, Byron, Block |
| Hallowell Historic District |
| Hall's Tavern |
| Hancock, John, Warehouse |
| Harraseeket Historic District |
| Haskell, Squire Ignatius, House |
| Head Tide Historic District |
| Herbert, The |
| Hobbs, Thomas, Jr., House |
| Irish, J. & O., Store |
| Islesford Historical Museum and Blue Ducks Ships Store |
| Isles of Shoals |
| Jacobs Houses and Store |
| Jarvis, Col. Charles and Mary Ann, Homestead |
| Jordan, F.M., House |
| KATAHDIN (Lake Boat) |
| Kennebunkport Historic District |
| Knowlton, Jabez, Store |
| Lakeside Grange #63 |
| Lancaster Block |
| Leighton, Adam P., House |
| Lewiston Commercial Historic District |
| Libby Island Light Station |
| Libby's Colonial Tea Room |
| Limerick Upper Village Historic District |
| Limington Historic District |
| Lion, The (locomotive) |
| Lower Alewive Historic District |
| Lower Lisbon Street Historic District |
| Lucerne Inn |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Mallett Hall |
| Market Square Historic District |
| McGilvery, Capt. John, House |
| Mechanic Institute |
| Merritt, Captain, House |
| Morse & Co. Office Building |
| Municipal Building |
| North Jay Grange Store |
| Norway Historic District |
Data from United States Park Service and Wikidata
