| Mahon, Diane | Long Range Planning Committee | Boards & Commissions | | |
| Morgan-Wu, Sarah | Commission for Arts and Culture (ACAC), 2023 | Boards & Commissions | | |
| Meister, Pamela | Historical Commission | Boards & Commissions | | |
| Munsey, James | Central School Feasibility Study Committee | Boards & Commissions | | |
| Miano, Mark | Building Maintenance Comm | Boards & Commissions, Town Manager | | |
| Mullen, Scott | Zero Waste Arlington | Boards & Commissions, Town Manager | | |
| Melofchik, Beth | Historic Districts Commission, Broadway District, 6/2026 | Boards & Commissions, Town Manager | | |
| Mahon, Diane M. | Budget Revenue Task Group, Select Board | Boards & Commissions, Town Manager | | |
| Mason, Michael | Audit Advisory Committee, CFO Schools | Boards & Commissions, Town Manager | | |
| Makowka, Steve | Historic Districts Commission, Chair, 2024 | Boards & Commissions, Town Manager | | |
| McCarthy, William | Public Memorial Committee | Boards & Commissions, Town Manager | | |
| Moore, Christopher | Town Meeting Procedures Committee | Boards & Commissions, Town Manager | | |
| Morgan, Jane P. | Vice Chair, School Committee, 2027 | Boards & Commissions, Town Manager | (781) 777-2776 | jmorgan@arlington.k12.ma.us |
| Melly, Ryan | Local Emergency Planning Committee, AFD Deputy Chief | Boards & Commissions, Town Manager | | |
| Marshall, Laurie | Local Emergency Planning Committee, AEMA/Aux | Boards & Commissions, Town Manager | | |
| Maxtutis, Jeffrey | TAC, Pct. Rep. 15-21, Vice Chair | Boards & Commissions, Town Manager | | |
| McBride, Brian | Conservation Commission, Associate | Conservation, Planning | | |
| Morgan, David | Environmental Planner/Conservation Agent | Conservation, Planning | (781) 316-3012 | dmorgan@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 | | |
