| Kalauskas, Charles | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Kalauskas, Charles | Master Plan Implementation Committee | Boards & Commissions | | |
| Kaplan, Dave | Conservation Commission | | | |
| Kardon, Len | Budget Revenue Task Force, School Committee | | | |
| Kardon, Len | Long Range Planning Committee | | | |
| Kardon, Leonard | School Committee, 2025 | Boards & Commissions, Town Manager | (617) 721-0288 | lkardon@arlington.k12.ma.us |
| Katofsky, Ryan | Clean Energy Future, Chair | | | |
| Katofsky, Ryan | High School Building Committee | | | |
| Kelder, Brian | Open Space Committee, Resident | Boards & Commissions | | |
| Kelleher, Karen | Affordable Housing Trust Fund Board | Town Manager | | |
| Kelleher, Karen | Housing Plan Implementation Committee | | | |
| Kelley, Kevin | Local Emergency Planning Committee, AFD Chief/EMD Director | Boards & Commissions, Town Manager | | |
| Kelley, Kevin | Municipal Vulnerability Preparedness, Arlington Fire Chief | | | |
| Kelly, Stephen | Constables | Boards & Commissions, Town Manager | (781) 731-0161 | smkelly@aim.com |
| Kenig Scher, Lidia | Poet Laureate Committee, ACAC Designee | Boards & Commissions, Town Manager | | |
| Kenschaft, Lori | Energy Advocate | | | |
| Keshian, Richard | Retirement Board | Boards & Commissions, Town Manager | | |
| Key, Laurie | Human Rights Commission, 2024 | Boards & Commissions, Town Manager | | |
| Kiernan, Brendan | Local Emergency Planning Committee, APD Captain | Boards & Commissions, Town Manager | | |
| Klein Collins, Mara | Council on Aging, Associate | | | |
