Jefferson County, New York ZIP codes
40 ZIP codes are in Jefferson County, plus 5 that cross in from neighboring counties. It's part of the Watertown-Fort Drum, NY metro area.
- ZIP codes
- 40
- Population in these ZIPs
- 115,972
- Avg. median income
- $68,500population-weighted
- Cities & towns
- 39
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Jefferson County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 13601 | Watertown | 36,839 | $58,791 | $205,400 |
| 13602 | Fort Drum | 2,440 | — | — |
| 13603 | Watertown | 14,136 | $62,500 | — |
| 13605 | Adams | 5,259 | $70,045 | $221,100 |
| 13606 | Adams Center | 2,468 | $88,977 | $234,300 |
| 13607 | Alexandria Bay | 2,020 | $66,500 | $286,200 |
| 13608 | Antwerp | 1,676 | $73,643 | $168,600 |
| 13611 | Belleville | 147 | $70,139 | $187,000 |
| 13612 | Black River | 2,865 | $85,658 | $249,500 |
| 13615 | Brownville | 700 | $101,563 | $214,900 |
| 13616 | Calcium | 1,430 | $45,962 | $229,300 |
| 13618 | Cape Vincent | 1,771 | $61,494 | $255,400 |
| 13619 | Carthage | 10,578 | $63,120 | $206,100 |
| 13622 | Chaumont | 1,859 | $81,065 | $265,700 |
| 13624 | Clayton | 4,650 | $87,988 | $329,700 |
| 13628 | Deferiet | 330 | $58,125 | $129,700 |
| 13632 | Depauville | 118 | $132,857 | — |
| 13634 | Dexter | 3,570 | $92,109 | $244,200 |
| 13636 | Ellisburg | 141 | $58,882 | $121,900 |
| 13637 | Evans Mills | 5,212 | $57,103 | $266,800 |
| 13638 | Felts Mills | 157 | $62,955 | $187,200 |
| 13640 | Wellesley Island | 318 | $118,026 | $491,500 |
| 13641 | Fishers Landing | 91 | $61,458 | $337,500 |
| 13643 | Great Bend | 193 | $100,625 | — |
| 13650 | Henderson | 1,236 | $94,318 | $275,600 |
| 13651 | Henderson Harbor | 147 | $116,705 | $332,400 |
| 13656 | La Fargeville | 2,942 | $72,500 | $206,700 |
| 13657 PO Box | Limerick | — | — | — |
| 13659 | Lorraine | 386 | $63,125 | $167,200 |
| 13661 | Mannsville | 1,908 | $82,297 | $224,800 |
| 13671 PO Box | Oxbow | — | — | — |
| 13673 | Philadelphia | 2,097 | $81,167 | $205,400 |
| 13674 | Pierrepont Manor | 178 | — | — |
| 13675 | Plessis | 54 | $208,182 | — |
| 13679 | Redwood | 1,205 | $101,932 | $226,700 |
| 13682 | Rodman | 854 | $79,821 | $237,800 |
| 13685 | Sackets Harbor | 2,362 | $79,469 | $298,900 |
| 13691 | Theresa | 2,990 | $79,943 | $217,000 |
| 13692 | Thousand Island Park | 222 | $190,250 | $376,600 |
| 13693 | Three Mile Bay | 423 | $72,396 | $274,300 |
ZIP codes partly in Jefferson County
These ZIP codes are mostly in a neighboring county but cover part of Jefferson County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 13083 | Lacona | Oswego County | 1,835 | $71,667 | $192,800 |
| 13626 | Copenhagen | Lewis County | 2,202 | $64,495 | $212,900 |
| 13642 | Gouverneur | St. Lawrence County | 9,043 | $49,728 | $140,300 |
| 13646 | Hammond | St. Lawrence County | 2,546 | $72,212 | $186,500 |
| 13665 | Natural Bridge | Lewis County | 465 | $51,250 | $164,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Jefferson County
- Watertown
- Fort Drum
- Adams
- Adams Center
- Alexandria Bay
- Antwerp
- Belleville
- Black River
- Brownville
- Calcium
- Cape Vincent
- Carthage
- Chaumont
- Clayton
- Deferiet
- Depauville
- Dexter
- Ellisburg
- Evans Mills
- Felts Mills
- Wellesley Island
- Fishers Landing
- Great Bend
- Henderson
- Henderson Harbor
- La Fargeville
- Limerick
- Lorraine
- Mannsville
- Oxbow
- Philadelphia
- Pierrepont Manor
- Plessis
- Redwood
- Rodman
- Sackets Harbor
- Theresa
- Thousand Island Park
- Three Mile Bay
Nearby counties
Frequently asked questions
How many ZIP codes are in Jefferson County, New York?
40 ZIP codes are mainly in Jefferson County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Jefferson County?
ZIP codes in Jefferson County use the city names Adams, Adams Center, Alexandria Bay, Antwerp, Belleville, Black River, Brownville, Calcium, Cape Vincent, Carthage, Chaumont and Clayton and others.
What metro area is Jefferson County in?
Jefferson County is part of the Watertown-Fort Drum, NY metropolitan statistical area.