| Swanson, David | Co-Chair, Community Preservation Act Committee, Select Board Appointee | Town Manager | | |
| Swan, Laura | TAC, School Committee Liaison, Chair | 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 | | |
| Susse, Jennifer | Finance Committee (Prct. 3, 2024) | | | |
| Susse, Jennifer | Budget Revenue Task Force, School Committee | | | |
| Susse, Jennifer | Election Modernization Committee, School Committee Designee | Town Manager | | |
| Susse, Jennifer | Remote Participation Study Committee, Co-Chair | | | |
| Sullivan, Mallory | CDBG Subcommittee, CDBG Administrator | | | Mjsullivan@town.arlington.ma.us |
| Stubbe, James | TAC, Member At Large | Boards & Commissions, Town Manager | | |
| Strosberg, Nat | Planning and Community Development Representative | | | |
| Strassburger, George | Local Emergency Planning Committee, AEMA | Boards & Commissions, Town Manager | | |
| Stevens, Nathaniel | Conservation Commission | Boards & Commissions | | |
| Stein, Miriam | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Stein, Leland | Parking Advisory Committee, Arlington Center Merchant | Boards & Commissions, Town Manager | | |
| Starks, Cindy | School Enrollment Task Force, School Committee | Town Manager | | cstarks@arlington.k12.ma.us |
| Stark, Rachel | Walk Arlington Rep. | | | |
| Stark, Rachael | Sustainable Transportation, Walking in Arlington | | | |
| Stanton, Paul | AHNAP, Chamber of Commerce | | | |
| Stange, Eric | Historical Commission | Boards & Commissions | | |
