There are 38 zip codes in Jefferson County, New York. The most populated is 13601, located in Watertown. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 13601 | 38,332 | Watertown |
| 13603 | 14,050 | Watertown |
| 13619 | 10,625 | Carthage |
| 13605 | 5,261 | Adams |
| 13624 | 4,933 | Clayton |
| 13637 | 4,493 | Evans Mills |
| 13634 | 3,947 | Dexter |
| 13656 | 3,230 | La Fargeville |
| 13691 | 3,123 | Theresa |
| 13602 | 2,798 | Fort Drum |
| 13612 | 2,703 | Black River |
| 13606 | 2,423 | Adams Center |
| 13685 | 2,187 | Sackets Harbor |
| 13673 | 2,163 | Philadelphia |
| 13622 | 1,985 | Chaumont |
| 13616 | 1,936 | Calcium |
| 13661 | 1,825 | Mannsville |
| 13608 | 1,818 | Antwerp |
| 13618 | 1,814 | Cape Vincent |
| 13607 | 1,750 | Alexandria Bay |
| 13650 | 1,355 | Henderson |
| 13679 | 1,108 | Redwood |
| 13682 | 845 | Rodman |
| 13615 | 586 | Brownville |
| 13659 | 379 | Lorraine |
| 13638 | 372 | Felts Mills |
| 13611 | 312 | Belleville |
| 13640 | 302 | Wellesley Island |
| 13693 | 294 | Three Mile Bay |
| 13628 | 268 | Deferiet |
| 13692 | 216 | Thousand Island Park |
| 13636 | 177 | Ellisburg |
| 13674 | 137 | Pierrepont Manor |
| 13651 | 126 | Henderson Harbor |
| 13632 | 107 | Depauville |
| 13675 | 61 | Plessis |
| 13643 | 60 | Great Bend |
| 13641 | 54 | Fishers Landing |