| Samenfeld, Scott | Arlington Cultural Council, Publicity, 4/30/2022 | | | |
| Susse, Jennifer | Election Modernization Committee, School Committee Designee | Town Manager | | |
| Sonin, Juhan | Election Modernization Committee | Town Manager | | |
| Stark, Rachael | Sustainable Transportation, Walking in Arlington | | | |
| Shah, Kristine | Sustainable Transportation, HHS | | | |
| Stanton, Paul | AHNAP, Chamber of Commerce | | | |
| Skahan, Tracy | Cyrus E. Dallin Museum Trustees | | | |
| Smith, Stacie Nicole | Remote Participation Study Committee, Secretary | | | |
| Susse, Jennifer | Remote Participation Study Committee, Co-Chair | | | |
| Simon, Hannah | Board of Youth Services, 2019 | Boards & Commissions | | |
| Stange, Eric | Historical Commission | Boards & Commissions | | |
| Schaefer, Dianne | Historical Commission | Boards & Commissions | | |
| Stevens, Nathaniel | Conservation Commission | Boards & Commissions | | |
| Schlichtman, Paul | Building Committee (PTBC), School Committee Liason | | | |
| Smith, Scott | Bicycle Advisory Committee (ABAC), 6/30/2025 | | | |
| Stein, Miriam | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Swaim, Dave | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Svenson, Carol | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Smith, Scott | TAC, Pct 1-7 Rep, Bicycle Advisory Liaison | Boards & Commissions, Town Manager | | |
| Stamps, Susan | Tree Committee, 12/2025 | Boards & Commissions, Town Manager | | |
