| Amagansett Teachers Association | Middle Country Teachers Association | |
| Assn of Educational Staff Developers of Eastern Suffolk BOCES | Middle Island Teachers Association | |
| Bellport Teachers Association | Miller Place Teachers Association | |
| BOCES Educators of Eastern Suffolk | Montauk Teachers Association | |
| Bridgehampton Teachers Association | Mount Sinai Teachers Association | |
| Brookhaven Health Professionals | Oysterponds Faculty Association | |
| Center Moriches Paraprofessionals | Patchogue Medford Congress of Teachers | |
| Center Moriches Public Schools Office Staff Association | Quoque Teachers Association | |
| Center Moriches Teachers Association | Remsenberg-Speonk Teachers Association | |
| District #32 United Teacher Aides | Riverhead Central Faculty Association | |
| East Hampton Teachers Association | Riverhead Charter School | |
| East Hampton UFSD Non-Teaching Employees Association | Riverhead Free Library Association | |
| East Moriches Teachers Association | Riverhead Teaching Assistants Assn. | |
| East Quogue Teachers Association | Rocky Point School Related Personnel Association | |
| Eastport/South Manor Teachers' Association | Rocky Point Teachers Association | |
| Fire Island Teachers Association | Shelter Island Faculty Association | |
| Fishers Island Teachers Association | Shoreham-Wading River Teachers Association | |
| Greenport Teachers Association | Southampton Teachers Association | |
| Hampton Bays Teachers Association | Southhold Faculty Association | |
| Little Flower Teachers Association | Springs Teachers Association | |
| Mattituck-Cutchogue Teachers Association | Teachers Association of Sag Harbor | |
| Middle Country Association of Teacher Aides | Tuckahoe Teachers Association | |
| Middle Country Registered Professional Nurses Association | Westhampton Beach Teachers Association | |
| Middle Country Secretarial Association | Willam Floyd United Teachers |