| Smith, Scott | TAC, Pct 1-7 Rep, Bicycle Advisory Liaison | Boards & Commissions, Town Manager | | |
| Smith, Stacie Nicole | Remote Participation Study Committee, Secretary | | | |
| Sonin, Juhan | Election Modernization Committee | Town Manager | | |
| Speare, Amy | Zero Waste Arlington | Assessor, Boards & Commissions, Clerk, Comptroller, Conservation, Dogs, Energy, Facilities, Finance, Finance Committee, Fire, Health & Human Services, Historical Commission, Human Resources , Information Technology , Inspectional Services, Legal, Library, Planning, Police, Public Works, Purchasing, Recreation, Schools, Select Board, Town Manager, Town Meeting, Treasurer, Veterans | | |
| Speare, Amy | High School Building Committee, Community Member | | | |
| Stamps, Susan | Tree Committee, 12/2025 | Boards & Commissions, Town Manager | | |
| Stange, Eric | Historical Commission | Boards & Commissions | | |
| Stanton, Paul | AHNAP, Chamber of Commerce | | | |
| Stark, Rachael | Sustainable Transportation, Walking in Arlington | | | |
| Stark, Rachel | Walk Arlington Rep. | | | |
| Starks, Cindy | School Enrollment Task Force, School Committee | Town Manager | | cstarks@arlington.k12.ma.us |
| Stein, Leland | Parking Advisory Committee, Arlington Center Merchant | Boards & Commissions, Town Manager | | |
| Stein, Miriam | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Stevens, Nathaniel | Conservation Commission | Boards & Commissions | | |
| Strassburger, George | Local Emergency Planning Committee, AEMA | Boards & Commissions, Town Manager | | |
| Strosberg, Nat | Planning and Community Development Representative | | | |
| Stubbe, James | TAC, Member At Large | Boards & Commissions, Town Manager | | |
| Sullivan, Mallory | CDBG Subcommittee, CDBG Administrator | | | Mjsullivan@town.arlington.ma.us |
| Susse, Jennifer | Finance Committee (Prct. 3, 2024) | | | |
| Susse, Jennifer | Budget Revenue Task Force, School Committee | | | |
