Massachusetts - Criteria: A (event)
| 1767 Milestones |
| Abbot Tavern |
| Academie Brochu |
| Academy Building |
| Academy Hill Historic District |
| Academy Historic District |
| Ace Art Company |
| Acton Centre Historic District |
| Acton High School |
| Acushnet Heights Historic District |
| Adams Apartment Building |
| Adams Building |
| Adams, Charles-Woodbury Locke House |
| Adams, Elwood, Store |
| Adams, Frederic C., Public Library |
| Adams, John, School |
| Adams-Magoun House |
| Adams National Historic Site |
| Adams-Nervine Asylum |
| Adriatic Mills |
| ADVENTURE (schooner) |
| African Meetinghouse |
| Agawam Center Historic District |
| Agawan Diner |
| Agudas Achim Anshei Sfard Synagogue |
| Ahern, Catherine, Three-Decker |
| Albree-Hall-Lawrence House |
| Alden, Arthur, House |
| Alden-Delahanty Block |
| Alden, William E., House |
| Aldrich, Daniel, Cottage and Sawmill |
| Aldrich, Nathan C., House and Resthaven Chapel |
| Alewife Brook Parkway |
| Alexander, Simeon, Jr. House |
| Algonquin Printing Co. |
| Allen, Ethan, House and Gun Shop |
| Allen Hotel |
| Allen, Nathaniel Topliff, Homestead |
| All Souls Church |
| Allston Congregational Church |
| Al Mac's Diner-Restaurant |
| Almshouse |
| Almshouse |
| Al's Diner |
| Alvah Stone Mill |
| American Antiquarian Society |
| American Net and Twine Company Factory |
| American Printing Co. and Metacomet Mill |
| American Waltham Watch Company Historic District |
| American Watch Tool Company |
| American Woolen Company Townhouses |
| American Woolen Mill Housing District |
| Amesbury and Salisbury Mills Village Historic District |
| Amesbury Friends Meeting House |
| Ames, Josiah A., House |
| Ames Manufacturing Company |
| Ames Schoolhouse |
| Amherst West Cemetery |
| Ammidown-Harding Farmhouse |
| Anawan Club Clubhouse and Caretaker's House |
| Anawan Rock |
| Ancient Burying Ground |
| Anderson, Larz, Park Historic District |
| Anderson, Ludwig, Three-Decker |
| Andover National Bank |
| Andover Street Historic District |
| Andover Town Hall |
| Andover Village Industrial District |
| Angle Tree Stone |
| Annisquam Bridge |
| Annisquam Harbor Light Station |
| Ann's Diner |
| Anthony, David M., House |
| Anthony, Harold H., House |
| Anthony House |
| Apponegansett Meeting House |
| Apremont Triangle Historic District |
| Arcade Building |
| Arcade, The |
| Arden |
| Arlington-Basswood Historic District |
| Arlington Gaslight Company |
| Arlington Mills Historic District |
| Arlington Pumping Station |
| Arlington Street Church |
| Armory of the First Corps of Cadets |
| Armstrong House |
| Arnold Print Works |
| Ashburnham Center Historic District |
| Ashfield Plain Historic District |
| Ashland Dam and Spillway |
| Ashland Mill Tenement |
| Ashland Town House |
| Ashley House |
| Ash Street School |
| Ashworth and Jones Factory |
| Assington |
| Assonet Historic District |
| Athenaeum Press |
| Atherton Bridge |
Data from United States Park Service and Wikidata
