Maine - Significance region: Local
| Abbott Memorial Library |
| Acadian Landing Site |
| Adams, D. V., Co.-Bussell and Weston |
| Adams-Pickering Block |
| Albany Town House |
| Alden, Ebenezer, House |
| Alfred Historic District |
| Alfred Shaker Historic District |
| Allan, Harold, Schoolhouse |
| All Souls Congregational Church |
| Alpha Tau Omega House |
| Amazeen House |
| American Woolen Company Foxcroft Mill |
| Anderson Bros. Store |
| Andover Hook and Ladder Company Building |
| Andover Public Library |
| Andrews, Lt. Robert, House |
| Androscoggin County Courthouse and Jail |
| Androscoggin Mill Block |
| Androscoggin Swinging Bridge |
| Androscoggin Yacht Club |
| Anson Grange #88 |
| Arch Bridge |
| Archeolgical Site No. 142-6 |
| Archeological Site No. 121-52a |
| Archeological Site No. 121-52B |
| Archeological Site No. 121-59 |
| Archeological Site No. 121-71 |
| Archeological Site No. 122-14 |
| Archeological Site No. 122-16 |
| Archeological Site No. 122-22 |
| Archeological Site No. 122-4a |
| Archeological Site No. 122-6 |
| Archeological Site No. 122-8 |
| Archeological Site No. 133.7 |
| Archeological Site No. 133.8 |
| Archeological Site No. 134-8 |
| Archeological Site No. 134-9 |
| Archeological Site No. 142-12 |
| Archeological Site No. 142-13 |
| Archeological Site No. 142-14 |
| Archeological Site No. 142-5 |
| Archeological Site No. 142-8 |
| Archeological Site No. 143-12 |
| Archeological Site No. 143-15 |
| Archeological Site No. 143-16 |
| Archeological Site No. 143-23 |
| Archeological Site No. 143-5 |
| Archeological Site No. 143-52 |
| Archeological Site No. 143-53 |
| Archeological Site No. 143-57 |
| Archeological Site No. 143-79 |
| Archibald-Adams House |
| Aroostook County Courthouse and Jail |
| Art Gallery |
| Atkinson Building |
| Auburn Commercial Historic District |
| Auburn Public Library |
| Augusta City Hall, Former |
| Auld-McCobb House |
| Averill - Philbrick House |
| Ayer, Caleb R., House |
| Back Cove |
| Badger, Samuel, Monument |
| BAGHEERA (schooner) |
| Bagley-Bliss House |
| Bailey, Charles M., Library |
| Bailey Farm Windmill |
| Bailey Island Library Hall |
| Bailey, Moses, House |
| Bangor Children's Home |
| Bangor Fire Engine House No. 6 |
| Bangor Hose House No. 5 |
| Bangor Standpipe |
| Bangs, Algernon, House |
| Bank Block |
| Barker Mill |
| Barn on Lot 8, Range G |
| Bass Boarding House |
| Bass Harbor Memorial Library |
| Bates Mill Historic District |
| Bath Historic District |
| Baxter House |
| Bayside Historic District |
| Beechnut Hut Historic District |
| Belfast National Bank |
| Bell Hill Meetinghouse |
| Bell Hill School |
| Bennett Bridge |
| Bennett, Nathaniel and Elizabeth, House |
| Benton Grange #458 |
| Berwick High School |
| Beth Eden Chapel |
| Biddeford City Hall |
| Biddeford Main Street Historic District |
| Biddeford-Saco Mills Historic District |
| Big Black Site |
| Bigelow-Page House |
| Big Ram Site |
| Bingham Free Meetinghouse |
Data from United States Park Service and Wikidata
