Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Archie T Morrison School | School | 33 | Norfolk | 42 12 36 N | 070 58 43 W |
| Archway School | School | 264 | Worcester | 42 15 31 N | 071 53 15 W |
| Arden Mill Dam | Dam | 125 | Worcester | 42 34 18 N | 071 47 10 W |
| Areys Pond | Lake | -4 | Barnstable | 41 45 37 N | 069 58 58 W |
| Arlington | Populated Place | 21 | Middlesex | 42 24 55 N | 071 09 23 W |
| Arlington center Historic District | Park | 9 | Middlesex | 42 24 57 N | 071 09 25 W |
| Arlington Heights | Populated Place | 102 | Middlesex | 42 25 13 N | 071 10 48 W |
| Arlington Heights Hills | Summit | 86 | Middlesex | 42 25 18 N | 071 11 18 W |
| Arlington Heights Junior High School West | School | 53 | Middlesex | 42 25 16 N | 071 10 29 W |
| Arlington Heights Playground | Park | 47 | Middlesex | 42 25 37 N | 071 11 15 W |
| Arlington Heights Post Office | Post Office | 51 | Middlesex | 42 25 28 N | 071 11 02 W |
| Arlington High School | School | 12 | Middlesex | 42 24 57 N | 071 09 02 W |
| Arlington High School | School | 12 | Middlesex | 42 24 55 N | 071 09 02 W |
| Arlington Historical Society Building | Building | 19 | Middlesex | 42 24 58 N | 071 09 26 W |
| Arlington Industrial Arts Junior High School | School | 28 | Middlesex | 42 24 52 N | 071 09 22 W |
| Arlington Junior High School West | School | 59 | Middlesex | 42 25 16 N | 071 10 30 W |
| Arlington Post Office | Post Office | 22 | Middlesex | 42 25 01 N | 071 09 21 W |
| Arlington Reservoir | Reservoir | 47 | Middlesex | 42 25 36 N | 071 11 22 W |
| Arlington School | School | 20 | Essex | 42 43 04 N | 071 10 28 W |
| Arlington Street Church | Church | 3 | Suffolk | 42 21 07 N | 071 04 15 W |
| Arlington Townhall | Building | 17 | Middlesex | 42 24 55 N | 071 09 19 W |
| Arlington-Basswood Historic District | Park | 23 | Essex | 42 43 11 N | 071 10 14 W |
| Arm Brook | Stream | | Hampden | 42 08 35 N | 072 44 33 W |
| Arm Brook Dam | Dam | 60 | Hampden | 42 08 54 N | 072 44 16 W |
| Arm Brook Reservoir | Reservoir | 66 | Hampden | 42 08 54 N | 072 44 16 W |
| Armenian Apostolic Church | Church | 189 | Worcester | 42 17 51 N | 071 49 13 W |
| Armenian Apostolic Church | Church | 108 | Worcester | 42 06 54 N | 071 39 17 W |
| Armenian Church of Martyrs | Church | 149 | Worcester | 42 15 12 N | 071 48 28 W |
| Armenian Church of Our Savior | Church | 156 | Worcester | 42 15 29 N | 071 48 16 W |
| Armenian Library and Museum of America | Building | 6 | Middlesex | 42 22 02 N | 071 11 12 W |
| Armenian Memorial Church | Church | 14 | Middlesex | 42 22 13 N | 071 09 29 W |
| Armenian Memorial Congregational Church | Church | 17 | Middlesex | 42 22 08 N | 071 09 22 W |
| Armory Museum of the Ancient and Honorable Artillery Company | Building | 6 | Suffolk | 42 21 36 N | 071 03 22 W |
| Armory Playground | Park | 7 | Norfolk | 42 20 47 N | 071 06 41 W |
| Armory Square | Park | 61 | Hampden | 42 06 29 N | 072 34 48 W |
| Armory Street Park | Park | 51 | Hampden | 42 07 10 N | 072 35 18 W |
| Armory Street School | School | 62 | Hampden | 42 07 17 N | 072 35 17 W |
| Arms Brook | Stream | | Franklin | 42 35 44 N | 072 37 00 W |
| Arms Cemetery | Cemetery | 147 | Franklin | 42 37 00 N | 072 43 58 W |
| Arms House Pond | Reservoir | 21 | Plymouth | 41 57 10 N | 070 39 53 W |
| Arms House Pond Dam | Dam | 14 | Plymouth | 41 57 12 N | 070 39 52 W |
| Arms Library Association Library | Building | 121 | Franklin | 42 36 12 N | 072 44 20 W |
| Arms Music Center | Building | 93 | Hampshire | 42 22 22 N | 072 31 06 W |
| Armsby Cemetery | Cemetery | 135 | Worcester | 42 09 06 N | 071 43 53 W |
| Arnold Arboretum | Park | 52 | Suffolk | 42 17 55 N | 071 07 40 W |
| Arnold Arboretum Horticulture Library | Building | 52 | Suffolk | 42 17 55 N | 071 07 40 W |
| Arnold B Sanford House | Building | 47 | Bristol | 41 42 46 N | 071 08 58 W |
| Arnold Hall | Building | 23 | Plymouth | 42 05 28 N | 070 45 17 W |
| Arnold Meadow | Swamp | 22 | Norfolk | 42 12 27 N | 070 59 48 W |
| Arnold Pond Dam | Dam | 181 | Worcester | 42 08 24 N | 071 47 34 W |
| Arnold Reservoir | Reservoir | 17 | Plymouth | 42 05 30 N | 070 45 22 W |
| Arnold Reservoir Dam | Dam | 17 | Plymouth | 42 05 30 N | 070 45 22 W |
| Arnold School | School | 21 | Plymouth | 42 05 27 N | 070 45 15 W |
| Arnolds Brook | Stream | | Norfolk | 42 01 37 N | 071 29 08 W |
| Arnoldville | Populated Place | 361 | Berkshire | 42 35 17 N | 073 08 01 W |
| Arrowhead | Building | 322 | Berkshire | 42 24 59 N | 073 14 53 W |
| Arsenal Mall Shopping Center | Locale | 15 | Middlesex | 42 21 44 N | 071 09 20 W |
| Arsenal Square | Park | 13 | Middlesex | 42 22 44 N | 071 07 26 W |
| Art Institute of Boston | Building | 19 | Middlesex | 42 20 54 N | 071 06 00 W |
| Art Institute of Boston Library | Building | 19 | Middlesex | 42 20 54 N | 071 06 00 W |
| Arthur and Elizabeth Schlesinger Library on the History of Women in America | Building | 13 | Middlesex | 42 22 33 N | 071 07 23 W |
| Arthur D Healey School | School | 4 | Middlesex | 42 23 51 N | 071 05 29 W |
| Arthur M Sackler Museum | Building | 17 | Middlesex | 42 22 31 N | 071 06 49 W |
| Arthur Smith Covered Bridge | Bridge | 163 | Franklin | 42 40 12 N | 072 43 07 W |
| Arthur T Talmadge School | School | 64 | Hampden | 42 05 45 N | 072 30 53 W |
| Arthur W Coolidge Middle School | School | 31 | Middlesex | 42 32 16 N | 071 06 38 W |
| Arthur W Dalyrymple School | School | 10 | Suffolk | 42 23 06 N | 070 58 23 W |
| Arthurs Seat | Summit | 293 | Franklin | 42 33 47 N | 072 38 34 W |
| Artichoke River | Stream | | Essex | 42 49 15 N | 070 56 18 W |
| Artichoke River Dam | Dam | 1 | Essex | 42 48 24 N | 070 55 52 W |
| Artichoke River Reservoir | Reservoir | 1 | Essex | 42 48 24 N | 070 55 52 W |
| Artist Center and Gallery | Building | 260 | Berkshire | 42 42 12 N | 073 05 25 W |
| Asambleas De Iglesias | Church | 19 | Essex | 42 42 26 N | 071 09 45 W |
| Asbury Grove | Populated Place | 17 | Essex | 42 37 20 N | 070 53 03 W |
| Ash Pond | Lake | 156 | Franklin | 42 23 30 N | 072 22 04 W |
| Ash Street School (historical) | School | 144 | Worcester | 42 15 26 N | 071 47 45 W |
| Ash Swamp | Swamp | 20 | Essex | 42 46 35 N | 070 58 08 W |
| Ash Swamp | Swamp | 94 | Middlesex | 42 41 15 N | 071 45 18 W |
| Ashburnham | Populated Place | 315 | Worcester | 42 38 10 N | 071 54 28 W |
| Ashburnham Community Church | Church | 326 | Worcester | 42 38 11 N | 071 54 45 W |
| Ashburnham State Forest | Forest | 360 | Worcester | 42 42 03 N | 071 54 58 W |
| Ashburnham Street School | School | 180 | Worcester | 42 34 33 N | 071 50 07 W |
| Ashburnham Town Hall | Building | 312 | Worcester | 42 38 12 N | 071 54 31 W |
| Ashby | Populated Place | 281 | Middlesex | 42 40 40 N | 071 49 13 W |
| Ashby Common | Park | 280 | Middlesex | 42 40 39 N | 071 49 08 W |
| Ashby Congregational Church | Church | 281 | Middlesex | 42 40 41 N | 071 49 11 W |
| Ashby Elementary School | School | 285 | Middlesex | 42 40 45 N | 071 49 20 W |
| Ashby Elementary School | School | 284 | Worcester | 42 40 44 N | 071 49 24 W |
| Ashby Free Public Library | Building | 273 | Middlesex | 42 40 36 N | 071 49 07 W |
| Ashby Post Office | Post Office | 274 | Middlesex | 42 40 35 N | 071 49 09 W |
| Ashby Reservoir | Reservoir | 284 | Middlesex | 42 39 42 N | 071 49 34 W |
| Ashby Reservoir Dam | Dam | 276 | Middlesex | 42 39 42 N | 071 49 34 W |
| Ashby Town Hall | Building | 273 | Worcester | 42 40 37 N | 071 49 12 W |
| Ashcroft | Populated Place | 45 | Norfolk | 42 14 00 N | 071 08 58 W |
| Ashdod | Populated Place | 31 | Plymouth | 42 04 07 N | 070 45 03 W |
| Ashdown House | Building | 10 | Middlesex | 42 21 27 N | 071 05 36 W |
| Ashfield | Populated Place | 378 | Franklin | 42 31 35 N | 072 47 18 W |
| Ashfield Plain Cemetery | Cemetery | 376 | Franklin | 42 31 45 N | 072 47 18 W |
| Ashfield Pond | Reservoir | 394 | Franklin | 42 30 42 N | 072 47 40 W |
| Ashfield Pond Dam | Dam | 383 | Franklin | 42 31 42 N | 072 47 40 W |
| Ashford Street School | School | 30 | Essex | 42 43 43 N | 071 08 46 W |
| Ashimuit (historical) | Locale | 24 | Barnstable | 41 38 00 N | 070 32 28 W |
| Ashland | Populated Place | 57 | Middlesex | 42 15 40 N | 071 27 48 W |
| Ashland High School | School | 62 | Middlesex | 42 15 50 N | 071 27 38 W |
| Ashland Mill Tenement | Building | 123 | Worcester | 42 03 54 N | 072 00 35 W |
| Ashland Post Office | Post Office | 64 | Middlesex | 42 15 35 N | 071 27 53 W |
| Ashland Public Library | Building | 57 | Middlesex | 42 15 39 N | 071 27 53 W |
| Ashland Reservoir | Reservoir | 65 | Middlesex | 42 15 00 N | 071 27 28 W |
| Ashland Reservoir Dam | Dam | 65 | Middlesex | 42 15 00 N | 071 27 28 W |
| Ashland School | School | 33 | Plymouth | 42 05 39 N | 071 00 50 W |