| Localité | Code postal |
|---|---|
| Barryville, Sullivan | 12719 |
| Bethel, Sullivan | 12720 |
| Bloomingburg, Sullivan | 12721 |
| Burlingham, Sullivan | 12722 |
| Callicoon, Sullivan | 12723 |
| Callicoon Center, Sullivan | 12724 |
| Claryville, Sullivan | 12725 |
| Cochecton, Sullivan | 12726 |
| Cochecton Center, Sullivan | 12727 |
| Eldred, Sullivan | 12732 |
| Fallsburg, Sullivan | 12733 |
| Ferndale, Sullivan | 12734 |
| Forestburgh, Sullivan | 12777 |
| Fremont, Sullivan | 12736 |
| Fremont Center, Sullivan | 12736 |
| Glen Spey, Sullivan | 12737 |
| Glen Wild, Sullivan | 12738 |
| Grahamsville, Sullivan | 12740 |
| Hankins, Sullivan | 12741 |
| Harris, Sullivan | 12742 |
| Highland Lake, Sullivan | 12743 |
| Hortonville, Sullivan | 12745 |
| Hurleyville, Sullivan | 12747 |
| Jeffersonville, Sullivan | 12748 |
| Kauneonga Lake, Sullivan | 12749 |
| Kenoza Lake, Sullivan | 12750 |