  | Affordable Housing Commission | |
| | America 250 Committee | On March 4, 2024, the Board of Selectpersons voted to designate an America 250 Committee to engage, encourage, & coordinate celebrating our country's 250th anniversary. The United States Semiquincentennial culminates on July 4, 2026 Independence Day. |
| | Board of Assessment Appeals | |
| | Board of Education | |
| | Board of Finance | |
| | Board of Selectmen | |
| | Boughton Road Emergency Operation Center Expansion Committee | |
| | Conservation Commission | |
| | Economic Development Commission | |
| | Ethics Commission | |
| | Flood & Erosion Control Board | |
| | Harbor Management Commission | |
| | Historic District Commission | |
| | Inland Wetlands Commission | |
| | Lymes' Senior Center Board of Directors | |
| | Lymes' Senior Center Building Committee | |
| | Old Lyme Sustainability Team | |
| | Open Space Commission | |
| | Parks & Recreation Commission | |
| | Pension Committee | |
| | Planning Commission | |
| | PRC Hains Park Enhancement Sub-Committee | |
| | Road and Public Safety Committee | |
| | Rogers Lake Authority | |
| | Shellfish Commission | |
| | Shoreline Gateway Committee | |
| | Sound View Commission | |
| | Sustainable Old Lyme | |
| | Tree Commission | |
| | Volunteers Pension Committee | |
| | Waste & Recycling Committee | |
| | Water Pollution Control Authority | |
| | Zoning Board of Appeals | |
| | Zoning Commission | |