| Tonkin, Christopher | Minuteman Bikeway 25th Anniversary Committee | | | |
| Tosi, Bob | Council on Aging, Associate | | | |
| Tosi, Jr., Bob | Arlington Committee on Tourism & Economic Development | Boards & Commissions, Town Manager | | |
| Tosi, Jr., Robert | Semiquincentennial Committee, Arlington Historical Society | | | |
| Tosti, Allan | Budget Revenue Task Force, Finance Committee | | | |
| Tosti, Allan | Finance Committee (Prct. 17, 2024) | | | |
| Tosti, Allan | School Enrollment Task Force, Finance Committee | Town Manager | | ATosti@town.arlington.ma.us |
| Tremblay, Geraldine | Cyrus E. Dallin Museum Trustees | | | |
| Trembly, Ed | Tree Committee, 12/2025 | Boards & Commissions, Town Manager | | |
| Vacant | Community Preservation Act Committee, Redevelopment Board | Town Manager | | |
| Vacant | Finance Committee (Prct. 2, 2025) | Finance Committee | | |
| Vacant | Finance Committee, (Pct. 18, 2023) | | | |
| Vacant | Historic District Commission, Central Street | Boards & Commissions | | |
| Vacant | Historic District Commission, Jason/Gray Street | Boards & Commissions | | |
| Vacant | Historic District Commission, Mt. Gilboa/Crescent Hill | Boards & Commissions | | |
| vacant | Human Rights Response Coordination Team, Selectmen | Boards & Commissions, Town Manager | | |
| Vacant | Local Emergency Planning Committee, Facilities Department | Boards & Commissions, Town Manager | | |
| Vacant | Local Emergency Planning Committee, Town Facilities Manager | Boards & Commissions, Town Manager | | |
| Vacant | Municipal Vulnerability Preparedness, Facilities Director | | | |
| Vacant | Public Memorial Committee | Boards & Commissions, Town Manager | | |
