Jefferson County, NY ZIP codes
There are 40 ZIP codes in Jefferson County, NY, in 39 towns, from 13601 to 13693. The largest are 13601 (Watertown), 13619 (Carthage) and 13603 (Watertown).
The county seat is Watertown.
- ZIP codes
- 40
- Towns
- 39
- County seat
- Watertown
- County FIPS
36045- State
- New York
- Population
- 115,040
- Median household income
- $66,301
- Land area
- 1,268 sq mi
- Metro area
- Watertown-Fort Drum
Jefferson County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Jefferson County ZIP codes
The ZIP codes of Jefferson County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Jefferson County in numbers
About 115,040 people live in Jefferson County, in 47,606 households, the 25th most populous of New York's 62 counties. The median household income is $66,301 a year, 23% below the New York median of $85,974 (US: $80,734). The median owner-occupied home is valued at $188,200 (56% below the New York median), and median gross rent is $1,213 a month. The median age is 33.7; 26.5% of adults 25 and over hold a bachelor's degree or higher (40.2% across New York); the average commute takes 20 minutes.
| Population | 115,040 |
|---|---|
| Households | 47,606 |
| Median age | 33.7 |
| Median household income | $66,301 |
| Median home value | $188,200 |
| Median gross rent | $1,213 |
| Bachelor's degree or higher | 26.5% |
| Mean commute | 19.5 min |
| Population density | 91 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Jefferson County
| Town | ZIP codes | Population |
|---|---|---|
| Watertown | 2 | 24,375 |
| Fort Drum | 1 | 16,065 |
| Carthage | 1 | 3,510 |
| Calcium | 1 | 2,935 |
| Clayton | 1 | 1,661 |
| Black River | 1 | 1,651 |
| Adams | 1 | 1,531 |
| Sackets Harbor | 1 | 1,490 |
| Alexandria Bay | 1 | 1,212 |
| Adams Center | 1 | 1,075 |
| Theresa | 1 | 945 |
| Great Bend | 1 | 938 |
| Philadelphia | 1 | 821 |
| Dexter | 1 | 754 |
| Brownville | 1 | 700 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Jefferson County.
Not sure you are in Jefferson County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Jefferson County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
13601 | Watertown , NY | Standard | 36,839 | $58,791 | $172,600 |
13602 | Fort Drum , NY | Standard | 2,440 | — | — |
13603 | Watertown , NY | Standard | 14,136 | $62,500 | — |
13605 | Adams , NY | Standard | 5,259 | $70,045 | $191,100 |
13606 | Adams Center , NY | Standard | 2,468 | $88,977 | $203,900 |
13607 | Alexandria Bay , NY | Standard | 2,020 | $66,500 | $176,100 |
13608 | Antwerp , NY | Standard | 1,676 | $73,643 | $111,600 |
13611 | Belleville , NY | Standard | 147 | $70,139 | $187,000 |
13612 | Black River , NY | Standard | 2,865 | $85,658 | $203,700 |
13615 | Brownville , NY | Standard | 700 | $101,563 | $192,300 |
13616 | Calcium , NY | Standard | 1,430 | $45,962 | $144,400 |
13618 | Cape Vincent , NY | Standard | 1,771 | $61,494 | $228,700 |
13619 | Carthage , NY | Standard | 10,578 | $63,120 | $178,700 |
13622 | Chaumont , NY | Standard | 1,859 | $81,065 | $234,700 |
13624 | Clayton , NY | Standard | 4,650 | $87,988 | $234,200 |
13628 | Deferiet , NY | Standard | 330 | $58,125 | $129,700 |
13632 | Depauville , NY | Standard | 118 | $132,857 | — |
13634 | Dexter , NY | Standard | 3,570 | $92,109 | $225,500 |
13636 | Ellisburg , NY | Standard | 141 | $58,882 | $121,900 |
13637 | Evans Mills , NY | Standard | 5,212 | $57,103 | $176,200 |
13638 | Felts Mills , NY | Standard | 157 | $62,955 | $203,300 |
13640 | Wellesley Island , NY | Standard | 318 | $118,026 | $370,200 |
13641 | Fishers Landing , NY | Standard | 91 | $61,458 | $337,500 |
13643 | Great Bend , NY | Standard | 193 | $100,625 | — |
13650 | Henderson , NY | Standard | 1,236 | $94,318 | $209,100 |
13651 | Henderson Harbor , NY | Standard | 147 | $116,705 | $332,400 |
13656 | La Fargeville , NY | Standard | 2,942 | $72,500 | $154,600 |
13657 | Limerick , NY | No street area | — | — | — |
13659 | Lorraine , NY | Standard | 386 | $63,125 | $166,000 |
13661 | Mannsville , NY | Standard | 1,908 | $82,297 | $183,400 |
13671 | Oxbow , NY | No street area | — | — | — |
13673 | Philadelphia , NY | Standard | 2,097 | $81,167 | $185,900 |
13674 | Pierrepont Manor , NY | Standard | 178 | — | — |
13675 | Plessis , NY | Standard | 54 | $208,182 | — |
13679 | Redwood , NY | Standard | 1,205 | $101,932 | $192,600 |
13682 | Rodman , NY | Standard | 854 | $79,821 | $228,900 |
13685 | Sackets Harbor , NY | Standard | 2,362 | $79,469 | $283,400 |
13691 | Theresa , NY | Standard | 2,990 | $79,943 | $173,400 |
13692 | Thousand Island Park , NY | Standard | 222 | $190,250 | $376,600 |
13693 | Three Mile Bay , NY | Standard | 423 | $72,396 | $234,200 |
Cite this page
zipcodes.pro. “Jefferson County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ny/county/jefferson
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