| Revilak, Pct. 1, Steve | Appointed by the Town Moderator | Town Manager | | |
| Reynolds, Emily | Arlington Cultural Council, Chair, 6/30/2023 | Town Manager | | |
| Rice M.D., Peter | Board of Health, 6/2025 | | | |
| Richmond, Erica | Arlington Civilian Police Advisory Commission, Clerk, 6/2026 | | | |
| Richter, Wendy | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Richter, Wendy | Master Plan Implementation Committee | Boards & Commissions | | |
| Richter, Wendy | Open Space Committee, Co-Chair, Arlington Redevelopment Board Designee | | | |
| Ricker, Claire | Director, Department of Planning and Community Development | Town Manager | | |
| Rob Behrent | High School Building Committee, Facilities Director | | | |
| Robinson, JoAnn | Community Preservation Act Committee, Historical Commission | Town Manager | | |
| Rogers , Kathleen | Civilian Police Advisory Board Study Committee, Human Rights Commission | | | |
| Rogers, Kathy | Arlington Civilian Police Advisory Commission, 6/2026 | | | |
| Roman, Joan | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Roman, Joan | Local Emergency Planning Committee, Public Information Officer | Boards & Commissions, Town Manager | | |
| Rothenberg, Jennifer | Park & Recreation Commission, 2021 | | | jrothenberg@town.arlington.ma.us |
| Rowe , Clarissa | Civilian Police Advisory Board Study Committee, Town Meeting Member | | | |
| Rowe, Clarissa | Community Preservation Act Committee, Select Board Appointee | Planning | | |
| Rubinson, Andy | LGBTQIA+ Rainbow Commission, 2022 | | | |
| Ruderman, Michael | Finance Committee (Prct. 9, 2024) | Boards & Commissions | | |
| Ruggieri, Mike | Uncle Sam Committee | Boards & Commissions, Town Manager | | |
