| Mulroy, Stacey | Director, Recreation | Town Manager | | |
| Munsey, James | Central School Feasibility Study Committee | Boards & Commissions | | |
| Murray, Caroline | Envision Arlington Standing Committee | | | |
| Muszynski, Mary | CDBG Subcommittee, CDBG Administrator | Town Manager | | |
| Nagle, Jack | Affordable Housing Trust Fund Board | | | |
| Newberg, Helene | Arlington Civilian Police Advisory Commission, 6/2025 | | | |
| Newell, Carlene | Board of Youth Services, 2017 | Boards & Commissions | | |
| Newton , Sanjay | Clerk, Civilian Police Advisory Board Study Committee, Town Meeting Member | | | sanjaynewton@gmail.com |
| Newton, Sanjay | Arlington Civilian Police Advisory Commission, 6/2027 | | | |
| Nichols, Karen | Council on Aging, Associate | | | |
| Nyberg, Jonathan | Housing Plan Implementation Committee | Boards & Commissions | | |
| O'Brien, Andy | Uncle Sam Committee | Boards & Commissions, Town Manager | | |
| Olszewski, Angela | Trust Fund Commission, 2022 | | | |
| O'Neill, Eugene | Public Memorial Committee | Boards & Commissions, Town Manager | | |
| O'Riordan, Janet | AHNAP, Old Schwamb Mill (Nonprofit) | | | |
| O'Riordan, Vice Chair, Steve | | Boards & Commissions, Town Manager | | |
| Pacejo, Jaclyn | Affordable Housing Trust Fund Board | Town Manager | | |
| Padaria, Arif | Trust Fund Commission, 2022 | Boards & Commissions | (781) 646-7822 | |
| Palmer, Maxwell | Election Modernization Committee | Town Manager | | |
| Parravano, Paul | Election Modernization Committee, Disability Commission | | | |
