| Mayer, Leslie | Park & Recreation Commission, 2024 | | | lmayer@town.arlington.ma.us |
| Morgan, Jane P. | Vice Chair, School Committee, 2027 | Boards & Commissions, Town Manager | (781) 777-2776 | jmorgan@arlington.k12.ma.us |
| Morgan, David | Environmental Planner/Conservation Agent | Conservation, Planning | (781) 316-3012 | dmorgan@town.arlington.ma.us |
| Mahon, Diane M. | Select Board, Vice Chair, 2026 | | (781) 646-9038 | DMahon@town.arlington.ma.us |
| Mahon, Diane M. | School Enrollment Task Force, Select Board | Town Manager | | DMahon@town.arlington.ma.us |
| Martin, Anna | Prevention Services Manager | Health & Human Services | (781) 316-3193 | amartin@town.arlington.ma.us |
| MacDonald (R), Ralph E. | Board of Registrars, 2026 | Town Manager | | |
| Meyer, Johanna | Envision Arlington Standing Committee | Boards & Commissions | | |
| McBride, Brian | Community Preservation Act Committee, Conservation Commission | Town Manager | | |
| Muszynski, Mary | CDBG Subcommittee, CDBG Administrator | Town Manager | | |
| McNulty, Julie | Master Plan Update Advisory Committee | Town Manager | | |
| Miller, Cheryl | Master Plan Update Advisory Committee | | | |
| Mastro, Greta | Commission for Arts & Culture (ACAC), 2025 | | | |
| McBride, Brian | Open Space Committee, Resident | | | |
| Morgan, David | Open Space Committee, Planning Department | | | |
| Morgan, David | Clean Energy Future, Conservation Agent | | | |
| Migliazzo, Sophie | Finance Committee (Prct. 4, 2024) | | | |
| Murray, Caroline | Envision Arlington Standing Committee | | | |
| McMurray, Brian | Arlington Cultural Council, Co-Chair, 6/30/2024 | Town Manager | | |
| Meeks, Amos | Clean Energy Future Committee | | | |
