| Sankalia, Priya | | Boards & Commissions, Finance Committee, Select Board, Town Manager | | |
| Sankalia, Priya | Zero Waste Arlington | | | |
| Samenfeld, Scott | Arlington Cultural Council, Publicity, 4/30/2022 | | | |
| Ryan-Vollmar , Susan | Co-Chair, Civilian Police Advisory Board Study Committee, LGBTQIA+ Rainbow Commission | Town Manager | | susanryanvollmar@gmail.com |
| Russo, Anmarie | Veterans Council (6/30/2018) | | | |
| Russian, DonnaRose | Election Modernization Committee, Republican Town Committee | | | |
| Ruiz, Dan | High School Building Committee | | | |
| Ruggieri, Mike | Uncle Sam Committee | Boards & Commissions, Town Manager | | |
| Ruderman, Michael | Finance Committee (Prct. 9, 2024) | Boards & Commissions | | |
| Rubinson, Andy | LGBTQIA+ Rainbow Commission, 2022 | | | |
| Rowe , Clarissa | Civilian Police Advisory Board Study Committee, Town Meeting Member | | | |
| Rowe, Clarissa | Community Preservation Act Committee, Select Board Appointee | Planning | | |
| Rothenberg, Jennifer | Park & Recreation Commission, 2021 | | | jrothenberg@town.arlington.ma.us |
| Roman, Joan | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Roman, Joan | Local Emergency Planning Committee, Public Information Officer | Boards & Commissions, Town Manager | | |
| Rogers, Kathy | Arlington Civilian Police Advisory Commission, 6/2026 | | | |
| Rogers , Kathleen | Civilian Police Advisory Board Study Committee, Human Rights Commission | | | |
| Robinson, JoAnn | Community Preservation Act Committee, Historical Commission | Town Manager | | |
| Rob Behrent | High School Building Committee, Facilities Director | | | |
| Ricker, Claire | Director, Department of Planning and Community Development | Town Manager | | |
