Jefferson County, county in New York, United States. As of 2020 county had an estimated population of 108,095 inhabitants. The county was created 219 years ago in 1805. Its county seat is Watertown.
There are 29 city/town in Jefferson County, NY. The largest city of Jefferson County is Brownville with a population of 5,876. Other cities include, Adams population 4,847, Clayton population 4,647, Watertown population 4,426, Champion population 4,236
Brownville, Human settlement in Jefferson County, New York, United States of America
Adams, Town in New York, United States
Clayton, Village in Jefferson County, New York, United States
Nestled along the shores of Lake Ontario and the St. Lawrence River in northern New York, Jefferson County is home to a mix of small cities, quaint villages, and rural towns. With its natural beauty and rich history, Jefferson County offers visitors a glimpse into classic upstate New York living.
The city of Watertown serves as the county seat and is the largest municipality in Jefferson County. As the commercial hub of the region, Watertown boasts a charming and walkable downtown full of shops, restaurants, and historic architecture. Other notable cities include Cape Vincent, known for its waterfront location and summer recreation, and Adams, located right on the border with Canada.
Dotted throughout Jefferson County's countryside are classic small towns like Sackets Harbor, a former shipbuilding center with ties to the War of 1812, and Alexandria Bay, located along the St. Lawrence River and home to the famous Boldt Castle. Quaint villages like Antwerp, Carthage, and Deferiet retain their rural charm andprovide a quieter pace of life.
With its blend of small cities, villages, and rural towns, Jefferson County offers visitors the best of classic upstate New York living. From the shores of Lake Ontario to the St. Lawrence River, the county's scenic landscapes and rich history make it the perfect place to experience the local culture and natural beauty of northern New York.
List of cities, towns, neighborhoods & other populated places in Jefferson County.
| City Name | Title | Population |
|---|---|---|
| Adams | Town in New York, United States | 4,847 |
| Adams Center | Census-designated place in Jefferson County, New York | 1,568 |
| Alexandria Bay | US village in New York State | 1,012 |
| Antwerp | Town in Jefferson County, New York, United States | 641 |
| Black River | Human settlement in Jefferson County, New York, United States of America | 1,217 |
| Brownville | Human settlement in Jefferson County, New York, United States of America | 5,876 |
| Calcium | Census-designated place in Jefferson County, New York | 3,491 |
| Cape Vincent | Town in New York | 2,661 |
| Carthage | Village in the United States | 3,256 |
| Champion | Town in Jefferson County, New York | 4,236 |
| Chaumont | Town | 568 |
| Clayton | Village in Jefferson County, New York, United States | 4,647 |
| Deferiet | Human settlement in Jefferson County, New York, United States of America | 278 |
| Dexter | Village in New York | 980 |
| Ellisburg | Town in Jefferson County, New York, United States | 3,284 |
| Evans Mills | Human settlement in Jefferson County, New York, United States of America | 545 |
| Glen Park | Village in Jefferson County, New York, United States | 462 |
| Henderson | Town in Jefferson County, New York, United States | 1,287 |
| Lorraine | New York town | 970 |
| Mannsville | Human settlement in Jefferson County, New York, United States of America | 330 |
| Philadelphia | Town in Jefferson County, New York, United States | 1,759 |
| Rodman | Human settlement in United States of America | 1,109 |
| Sackets Harbor | City in Jefferson County, New York, United States of America | 1,376 |
| Smithville | Town in New York, United States | 1,257 |
| Theresa | Town in Jefferson County, New York, United States | 766 |
| Watertown | Town in Jefferson County, New York | 4,426 |
| Waterville | Village in New York, United States | 1,502 |
| West Carthage | Village in New York, USA | 1,901 |
| Worth | Human settlement in Jefferson County, New York, United States of America | 219 |
