Jefferson County, New York Zip Codes
📍 Jefferson County has 42 zip codes with a population of 117,540.
Jefferson County is located in New York with a land area of 1,247 square miles. The county seat is Watertown. Below you'll find all 42 zip codes in Jefferson County with population, income and home value, the county's affordability profile, and links to its 41 city pages.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Jefferson County Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 13601 | Watertown | View → |
| 13602 | Fort Drum | View → |
| 13603 | Watertown | View → |
| 13605 | Adams | View → |
| 13606 | Adams Center | View → |
| 13607 | Alexandria Bay | View → |
| 13608 | Antwerp | View → |
| 13611 | Belleville | View → |
| 13612 | Black River | View → |
| 13615 | Brownville | View → |
| 13616 | Calcium | View → |
| 13618 | Cape Vincent | View → |
| 13619 | Carthage | View → |
| 13622 | Chaumont | View → |
| 13624 | Clayton | View → |
| 13628 | Deferiet | View → |
| 13632 | Depauville | View → |
| 13634 | Dexter | View → |
| 13636 | Ellisburg | View → |
| 13637 | Evans Mills | View → |
| 13638 | Felts Mills | View → |
| 13640 | Wellesley Island | View → |
| 13641 | Fishers Landing | View → |
| 13643 | Great Bend | View → |
| 13650 | Henderson | View → |
| 13651 | Henderson Harbor | View → |
| 13656 | La Fargeville | View → |
| 13657 | Limerick | View → |
| 13659 | Lorraine | View → |
| 13661 | Mannsville | View → |
| 13665 | Natural Bridge | View → |
| 13671 | Oxbow | View → |
| 13673 | Philadelphia | View → |
| 13674 | Pierrepont Manor | View → |
| 13675 | Plessis | View → |
| 13679 | Redwood | View → |
| 13682 | Rodman | View → |
| 13685 | Sackets Harbor | View → |
| 13688 | South Rutland | View → |
| 13691 | Theresa | View → |
| 13692 | Thousand Island Park | View → |
| 13693 | Three Mile Bay | View → |
Jefferson County at a Glance
Jefferson County has 42 ZIP codes in this directory: 42 standard delivery ZIPs. The 33 ZIPs with published Census housing data cover 117,540 residents, the largest being 13601 (Watertown) with 37,409 people.
The median ZIP in Jefferson County has a household income of $75,673 and a home value of $188,200, a price-to-income ratio of 2.7, below the 2.9 New York ZIP median. Affordability ranges from 13608 in Antwerp at a ratio of 1.6 to 13651 in Henderson Harbor, where the median home is $338,500. The highest median income is in 13692 (Thousand Island Park) at $161,500. Median rent across these ZIPs is $965 a month.
78% of households in the typical Jefferson County ZIP own their home (statewide ZIP median 80%). 25% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 11.5%, above the 9.9% statewide ZIP median. Overall density is about 94 residents per square mile across 1,247 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 New York ZIP Code Affordability Report.
Jefferson County Zip Code Map
Interactive map of Jefferson County, New York zip codes.