| Zip Code | City | Population ↓ |
|---|---|---|
| 12701 | Monticello | 12,197 |
| 12754 | Liberty | 8,296 |
| 12721 | Bloomingburg | 7,359 |
| 12790 | Wurtsboro | 4,537 |
| 12758 | Livingston Manor | 4,025 |
| 12788 | Woodbourne | 3,037 |
| 12775 | Rock Hill | 2,623 |
| 12789 | Woodridge | 2,594 |
| 12747 | Hurleyville | 2,234 |
| 12779 | South Fallsburg | 2,205 |
| 12723 | Callicoon | 1,923 |
| 12733 | Fallsburg | 1,865 |
| 12764 | Narrowsburg | 1,861 |
| 12759 | Loch Sheldrake | 1,619 |
| 12748 | Jeffersonville | 1,518 |
| 12737 | Glen Spey | 1,513 |
| 12751 | Kiamesha Lake | 1,407 |
| 12719 | Barryville | 1,339 |
| 12726 | Cochecton | 1,168 |
| 12783 | Swan Lake | 1,060 |
| 12734 | Ferndale | 950 |
| 12785 | Westbrookville | 917 |
| 12763 | Mountain Dale | 890 |
| 12765 | Neversink | 873 |
| 12768 | Parksville | 857 |
| 12732 | Eldred | 776 |
| 12791 | Youngsville | 763 |
| 12778 | Smallwood | 707 |
| 12777 | Forestburgh | 695 |
| 12786 | White Lake | 610 |
| 12766 | North Branch | 535 |
| 12720 | Bethel | 447 |
| 12738 | Glen Wild | 423 |
| 12749 | Kauneonga Lake | 419 |
| 12762 | Mongaup Valley | 394 |
| 12769 | Phillipsport | 325 |
| 12752 | Lake Huntington | 309 |
| 12743 | Highland Lake | 279 |
| 12742 | Harris | 253 |
| 12741 | Hankins | 222 |
| 12787 | White Sulphur Springs | 192 |
| 12781 | Summitville | 177 |
| 12792 | Yulan | 163 |
| 12767 | Obernburg | 156 |
| 12770 | Pond Eddy | 145 |
| 12736 | Fremont Center | 145 |
| 12724 | Callicoon Center | 60 |
| 12483 | Spring Glen | 45 |
| 12750 | Kenoza Lake | 33 |
| 12745 | Hortonville | 20 |
| 12784 | Thompsonville | 0 |
| 12722 | Burlingham | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 52 ZCTAs in Sullivan County, New York (US Census).