| Mahon, Diane | Long Range Planning Committee | Boards & Commissions | | |
| Morales, Carlos | Civilian Police Advisory Board Study Committee, Envision Arlington Diversity Task Group | | | |
| Maxtutis, Jeff | Mass Ave/Appleton Design Review Committee, Transportation Advisory Committee | | | |
| Mongold, Neal | Affordable Housing Trust Fund Board | Town Manager | | |
| 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 | | | |
| 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 | | |
| 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 | | |
