| Lau, Marisa | Senior Planner | Planning | (781) 316-3091 | mlau@town.arlington.ma.us |
| LaBau, Brian | Architect, At Large, 2025 | Boards & Commissions, Town Manager | | |
| Logan (D) , William | Board of Registrars, 2027 | Boards & Commissions | | |
| LeBlanc, Adam | Zoning Board of Appeals, Associate Member, 3/2026 | Boards & Commissions | | |
| Luczai, Katie | Parking Advisory Committee, Planning | Town Manager | | |
| Luczai, Katie | Commission for Arts & Culture (ACAC), Economic Development Coordinator | | | |
| Luczai, Katie | Arlington Committee on Tourism & Economic Development | | | kluczai@town.arlington.ma.us |
| Locke, Beth | Semiquincentennial Committee, Arlington Chamber of Commerce | | | |
| LeRoyer, Ann | Master Plan Update Advisory Committee | | | |
| Lyons, William | Arlington Committee on Tourism & Economic Development | Boards & Commissions | | |
| LeRoyer, Ann | Open Space Committee, Resident | | | |
| Lobel, Josh | Finance Committee (Prct. 8, 2025) | | | |
| LaCourt, Annie | Long Range Planning Committee | | | |
| Lucarelli, Stephanie | Information Technology Advisory Committee | Boards & Commissions, Town Manager | | |
| LeRoyer, Ann | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Leger, Colleen | Local Emergency Planning Committee, Director Health & Human Services | Boards & Commissions, Town Manager | | |
| Lyons, William | Arlington Committee on Tourism & Economic Development | | | |
| Laube, Melissa | TAC, Pct. Rep. 8-14 | Boards & Commissions, Town Manager | | |
| Laube, Melissa | Parking Advisory Committee, Transportation Advisory Committee | Boards & Commissions, Town Manager | | |
| Lionetta, Anthony | Central School Feasibility Study Committee | Boards & Commissions | | |
