Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Acton-Roxborough Regional High School | School | 74 | Middlesex | 42 28 36 N | 071 27 28 W |
| Ada Govan Bird Sanctuary | Park | 106 | Middlesex | 42 27 10 N | 071 13 15 W |
| Adams Dam | Dam | 86 | Middlesex | 42 40 00 N | 071 42 34 W |
| Adams Playground | Park | 55 | Middlesex | 42 25 43 N | 071 12 18 W |
| Adams Plaza Shopping Center | Locale | 10 | Middlesex | 42 26 02 N | 071 02 23 W |
| Addition Hill | Summit | 137 | Middlesex | 42 21 42 N | 071 33 42 W |
| Admiral Morison Statue | Park | 12 | Middlesex | 42 21 04 N | 071 04 52 W |
| Admirals Hill | Populated Place | 28 | Middlesex | 42 23 24 N | 071 02 51 W |
| Agassiz Community Center | Building | 11 | Middlesex | 42 22 56 N | 071 07 03 W |
| Agassiz Community Childrens Preschool | School | 17 | Middlesex | 42 23 12 N | 071 07 06 W |
| Agassiz School | School | 10 | Middlesex | 42 22 56 N | 071 07 00 W |
| Aggasiz House | Building | 10 | Middlesex | 42 22 34 N | 071 07 20 W |
| Aiken Building | Building | 12 | Middlesex | 42 22 43 N | 071 07 06 W |
| Albanian Orthodox Church | Church | 52 | Middlesex | 42 17 12 N | 071 21 11 W |
| Albany Street Garage | Building | 8 | Middlesex | 42 21 43 N | 071 05 30 W |
| Albert Parlin Junior High School | School | 34 | Middlesex | 42 24 36 N | 071 03 05 W |
| Albert W Lewis School | School | 12 | Middlesex | 42 24 46 N | 071 03 58 W |
| Alcott Elementary School | School | 38 | Middlesex | 42 27 13 N | 071 20 48 W |
| Alcott House Museum | Building | 55 | Middlesex | 42 27 31 N | 071 20 12 W |
| Alden Play Area | Park | 8 | Middlesex | 42 22 52 N | 071 07 00 W |
| Aldersgate Church | Church | 43 | Middlesex | 42 34 39 N | 071 20 15 W |
| Aldrich Building | Building | 17 | Middlesex | 42 21 57 N | 071 07 18 W |
| Alewife Brook | Stream | | Middlesex | 42 24 54 N | 071 07 55 W |
| Algonquin Club | Building | 16 | Middlesex | 42 21 04 N | 071 04 55 W |
| Alice M Barrows School | School | 40 | Middlesex | 42 31 17 N | 071 07 27 W |
| All Nations Christian Center | Church | 33 | Middlesex | 42 38 46 N | 071 20 25 W |
| All Saints Church | Church | 45 | Middlesex | 42 35 50 N | 071 21 01 W |
| All Saints Episcopal Church | Church | 43 | Middlesex | 42 29 02 N | 071 05 57 W |
| Allen Dam | Dam | 47 | Middlesex | 42 28 42 N | 071 24 52 W |
| Allison Park | Park | 7 | Middlesex | 42 22 00 N | 071 11 50 W |
| Almys-First National Shopping Center | Locale | 43 | Middlesex | 42 30 42 N | 071 11 52 W |
| Althea Lake | Lake | 49 | Middlesex | 42 40 06 N | 071 22 48 W |
| Alumnae Hall | Building | 13 | Middlesex | 42 24 14 N | 071 07 05 W |
| Alumni Center | Building | 20 | Middlesex | 42 21 35 N | 071 05 32 W |
| Alumni Field | Park | 39 | Middlesex | 42 37 54 N | 071 16 34 W |
| Alumni Fields | Park | 7 | Middlesex | 42 24 26 N | 071 06 51 W |
| Alumni House | Building | 40 | Middlesex | 42 20 39 N | 071 11 31 W |
| Alumni Stadium | Park | 49 | Middlesex | 42 20 08 N | 071 10 01 W |
| Alumni Swimming Pool | Locale | 8 | Middlesex | 42 21 40 N | 071 05 23 W |
| Ambrose Elementary School | School | 43 | Middlesex | 42 26 44 N | 071 09 22 W |
| Amelia Earhart Dam | Dam | 0 | Middlesex | 42 23 42 N | 071 04 31 W |
| Amenge Field | Locale | 24 | Middlesex | 42 25 52 N | 071 04 57 W |
| American Academy of Arts and Sciences | Building | 9 | Middlesex | 42 22 51 N | 071 06 37 W |
| American Jewish Historical Society Building | Building | 72 | Middlesex | 42 22 11 N | 071 15 33 W |
| American Legion Field | Park | 70 | Middlesex | 42 35 40 N | 071 27 33 W |
| American Meterological Society | Building | 29 | Middlesex | 42 21 25 N | 071 04 00 W |
| Amerige Field | Locale | 24 | Middlesex | 42 25 52 N | 071 04 57 W |
| Ames Building | Building | 11 | Middlesex | 42 22 46 N | 071 07 05 W |
| Ames Hill | Summit | 122 | Middlesex | 42 38 03 N | 071 13 42 W |
| Ames Pond | Reservoir | 50 | Middlesex | 42 38 00 N | 071 13 18 W |
| Ames Pond Industrial Park | Locale | 52 | Middlesex | 42 38 23 N | 071 14 05 W |
| Ames Street School | School | 31 | Middlesex | 42 38 20 N | 071 18 15 W |
| Amy Lowell House | Building | 11 | Middlesex | 42 21 56 N | 071 03 59 W |
| Anderson Bridge | Bridge | 2 | Middlesex | 42 22 08 N | 071 07 23 W |
| Anderson Hall | Building | 27 | Middlesex | 42 24 23 N | 071 07 00 W |
| Andover Building | Building | 10 | Middlesex | 42 22 49 N | 071 06 56 W |
| Andover Newton Theological School | School | 95 | Middlesex | 42 19 30 N | 071 11 22 W |
| Andover-Harvard Theological Library | Building | 9 | Middlesex | 42 22 47 N | 071 06 55 W |
| Andrews Hill | Summit | 68 | Middlesex | 42 26 33 N | 071 09 33 W |
| Andrews School | School | 63 | Middlesex | 42 11 50 N | 071 25 51 W |
| Angelica Brook | Stream | | Middlesex | 42 18 22 N | 071 28 44 W |
| Angiers Pond | Reservoir | 46 | Middlesex | 42 28 32 N | 071 22 40 W |
| Angle School | School | 48 | Middlesex | 42 19 35 N | 071 13 58 W |
| Anna Murphy Playground | Park | 54 | Middlesex | 42 16 00 N | 071 25 37 W |
| Anniversary Park East | Park | 58 | Middlesex | 42 22 04 N | 071 17 48 W |
| Annursnac Hill | Summit | 114 | Middlesex | 42 28 40 N | 071 23 43 W |
| Anthony Costa Playground | Park | 4 | Middlesex | 42 22 04 N | 071 04 48 W |
| Anthony House | Building | 27 | Middlesex | 42 24 19 N | 071 07 06 W |
| Antioch Temple | Church | 6 | Middlesex | 42 21 44 N | 071 06 26 W |
| Antiquarian House | Building | 46 | Middlesex | 42 27 27 N | 071 20 28 W |
| Apostolic Pentecostal Church | Church | 7 | Middlesex | 42 21 55 N | 071 06 40 W |
| Apple Valley Baptist Church | Church | 84 | Middlesex | 42 33 35 N | 071 35 05 W |
| Appleton Mill | Locale | 31 | Middlesex | 42 38 42 N | 071 18 52 W |
| Aquinas Junior College | School | 14 | Middlesex | 42 21 25 N | 071 11 41 W |
| Aquinas Newton College Library | Building | 19 | Middlesex | 42 21 27 N | 071 11 40 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 Townhall | Building | 17 | Middlesex | 42 24 55 N | 071 09 19 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 |
| 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 W Coolidge Middle School | School | 31 | Middlesex | 42 32 16 N | 071 06 38 W |
| Ash Swamp | Swamp | 94 | Middlesex | 42 41 15 N | 071 45 18 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 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 |