| Owner Members | Associate Members | Contract Members |
|---|---|---|
| Bridgton | Baldwin | Alfred |
| Cape Elizabeth | Hiram | Appleton |
| Casco | Naples | Augusta |
| Cumberland | Parsonsfield | Blue Hill |
| Falmouth | Porter | Brooklin |
| Freeport | Saco | Brooksville |
| Gorham | Standish | Brownfield |
| Gray | Brunswick |
|
| Harrison | Chebeague Island | |
| Hollis | Chelsea | |
| Limington | Cornish | |
| Lyman | Denmark | |
| North Yarmouth | Eliot | |
| Portland | Fayette | |
| Pownal | Frye Island | |
| Scarborough | Fryeburg | |
| South Portland | Greenland (NH) | |
| Waterboro | Kennebunkport | |
| Windham | Kittery | |
| Yarmouth | Lamoine | |
| Liberty | ||
| Limerick | ||
| Livermore Falls | ||
| Monmouth | ||
| Mt. Vernon | ||
| Newington (NH) | ||
| North Haven | ||
| Old Orchard Beach | ||
| Otisfield | ||
| Owl's Head | ||
| Readfield | ||
| Rockland | ||
| Sanford | ||
| Sedgwick | ||
| Shapleigh | ||
| Somerville | ||
| South Thomaston | ||
| Surry | ||
| Swanville | ||
| Thomaston | ||
| Union | ||
| Vinalhaven | ||
| Washington | ||
| Waterville | ||
| Wayne | ||
| Westbrook | ||
| Woolwich |
