| Locality | Post Code |
|---|---|
| Amagansett, Suffolk | 11930 |
| Amity Harbor, Suffolk | 11701 |
| Amityville, Suffolk | 11701 |
| Aquebogue, Suffolk | 11931 |
| Asharoken, Suffolk | 11768 |
| Babylon, Suffolk | 11702 |
| Baiting Hollow, Suffolk | 11933 |
| Bay Hills, Suffolk | 11743 |
| Bay Point, Suffolk | 11963 |
| Bay Shore, Suffolk | 11706 |
| Bayberry Point, Suffolk | 11751 |
| Baycrest, Suffolk | 11743 |
| Bayport, Suffolk | 11705 |
| Beach Hampton, Suffolk | 11930 |
| Beech Croft, Suffolk | 11743 |
| Belle Terre, Suffolk | 11777 |
| Bellport, Suffolk | 11713 |
| Blue Point, Suffolk | 11715, 11772 |
| Bohemia, Suffolk | 11716 |
| Box Hill, Suffolk | 11780 |
| Brentwood, Suffolk | 11717 |
| Bridgehampton, Suffolk | 11932 |
| Brightwaters, Suffolk | 11718 |
| Brookhaven, Suffolk | 11719 |
| Calverton, Suffolk | 11933 |
| Canaan Lake, Suffolk | 11772 |