Cities and Towns in Jefferson County, New York
Founded in 1805, Jefferson County is one of 62 counties in the state of New York. Historically, Jefferson County was formed from Oneida County. The city of Watertown is the county seat. With FIPS code of 45, Jefferson County has a population of 116,295 and area of 1,857 square miles (4,810 km²).
List of all cities in Jefferson County, NY alphabetically
| City/Town | Postal Code | Area Code |
| Adams, NY | 13605 | 315 |
| Adams Center, NY | 13606 | 315 |
| Adams Cove, NY | 13634 | 315 |
| Alex Bay, NY | 13607 | 315 |
| Alexandra Bay, NY | 13607 | 315 |
| Alexandria, NY | 13607 | 315 |
| Antwerp, NY | 13608 | 315 |
| Antwerp, NY | 13671 | 315 |
| Belleville, NY | 13611 | 315 |
| Black River, NY | 13612 | 315 |
| Boultons Beach, NY | 13685 | 315 |
| Brownville, NY | 13615 | 315 |
| Calcium, NY | 13616 | 315 |
| Cape Vincent, NY | 13618 | 315 |
| Carthage, NY | 13619 | 315 |
| Champion, NY | 13619 | 315 |
| Champion Huddle, NY | 13619 | 315 |
| Chaumont, NY | 13622 | 315 |
| Clayton, NY | 13624 | 315 |
| Collins Landing, NY | 13607 | 315 |
| Deferiet, NY | 13628 | 315 |
| Depauville, NY | 13632 | 315 |
| Dexter, NY | 13634 | 315 |
| Dexter, NY | 13657 | 315 |
| Diamond, NY | 13659 | 315 |
| East Rodman, NY | 13682 | 315 |
| Edgewood Park, NY | 13607 | 315 |
| Ellisburg, NY | 13636 | 315 |
| Evans Mills, NY | 13637 | 315 |
| Felts Mills, NY | 13638 | 315 |
| Fineview, NY | 13640 | 315 |
| Fishers Landing, NY | 13641 | 315 |
| Fort Drum, NY | 13602 | 315 |
| 13603 | 315 | |
| Frontenac, NY | 13624 | 315 |
| Glen Park, NY | 13601 | 315 |
| Great Bend, NY | 13643 | 315 |
| Grenell, NY | 13624 | 315 |
| Grindstone, NY | 13624 | 315 |
| Gt Bend, NY | 13643 | 315 |
| Guffin Bay, NY | 13634 | 315 |
| Henderson, NY | 13650 | 315 |
| Henderson Harbor, NY | 13651 | 315 |
| Herrings, NY | 13619 | 315 |
| Hounsfield, NY | 13685 | 315 |
| Jefferson Park, NY | 13650 | 315 |
| La Fargeville, NY | 13656 | 315 |
| Lafargeville, NY | 13656 | 315 |
| Le Ray, NY | 13637 | 315 |
| Limerick, NY | 13657 | 315 |
| Lorraine, NY | 13659 | 315 |
| Mannsville, NY | 13661 | 315 |
| Murray Isle, NY | 13624 | 315 |
| Muskalounge, NY | 13634 | 315 |
| Natural Brg, NY | 13665 | 315 |
| Natural Bridge, NY | 13665 | 315 |
| Omar, NY | 13656 | 315 |
| Oswegatchie, NY | 13691 | 315 |
| Oxbow, NY | 13608 | 315 |
| 13671 | 315 | |
| Paddy Hill, NY | 13615 | 315 |
| Pamelia, NY | 13637 | 315 |
| Pamelia Four Corners, NY | 13637 | 315 |
| Perch River, NY | 13634 | 315 |
| Philadelphia, NY | 13673 | 315 |
| Pierrepont Manor, NY | 13674 | 315 |
| Pillar Point, NY | 13634 | 315 |
| Plessis, NY | 13675 | 315 |
| Point Vivian, NY | 13607 | 315 |
| Redwood, NY | 13679 | 315 |
| Rodman, NY | 13682 | 315 |
| Rural Hill, NY | 13650 | 315 |
| Rutland, NY | 13638 | 315 |
| Sackets Harbor, NY | 13685 | 315 |
| Saint Lawrence Park, NY | 13607 | 315 |
| Sherwin Bay, NY | 13634 | 315 |
| Smithville, NY | 13605 | 315 |
| Stone Mills, NY | 13656 | 315 |
| Theresa, NY | 13691 | 315 |
| Thous Is Park, NY | 13692 | 315 |
| Thousand Island Park, NY | 13692 | 315 |
| Three Mile Bay, NY | 13693 | 315 |
| Watertown, NY | 13601 | 315 |
| 13602 | 315 | |
| 13603 | 315 | |
| Wegatchie, NY | 13608 | 315 |
| Wellesley Island, NY | 13640 | 315 |
| West Carthage, NY | 13619 | 315 |
| Westminster Park, NY | 13607 | 315 |
| Wilna, NY | 13619 | 315 |
| Woodville, NY | 13650 | 315 |
| Worth, NY | 13659 | 315 |
| Wtown, NY | 13601 | 315 |
| 13602 | 315 |
Major Cities and Towns in Jefferson County, New York
Watertown
Overview
- Area: 9.3 square miles
- Population: Approximately 25,000
- Zip Codes: 13601, 13603
- Latitude: 43.9748° N
- Longitude: 75.9108° W
Watertown, the county seat of Jefferson County, is located near the Black River and serves as a major commercial and cultural hub in northern New York. Founded in 1800, Watertown developed as a milling center thanks to the power generated by the Black River, and it quickly became known for its production of paper and machinery. By the mid-19th century, Watertown grew rapidly with the establishment of factories and businesses, becoming a vibrant economic center. Today, the city is a gateway to the Thousand Islands region, with historic architecture, a bustling downtown, and proximity to Fort Drum, a significant U.S. Army installation.
Education and Landmarks
Watertown City School District serves the area, with Watertown High School offering diverse academic and athletic programs. Key landmarks include the historic Paddock Arcade, one of the oldest covered shopping arcades in the United States, and the Roswell P. Flower Memorial Library, known for its stunning architecture. The Thompson Park Zoo & Conservancy, a beloved local attraction, provides a view of native wildlife and scenic trails. Each summer, the city hosts the Jefferson County Fair, one of the oldest county fairs in the country, drawing visitors from across the region. With its historical significance, educational resources, and recreational opportunities, Watertown remains the heart of Jefferson County.
Carthage
Overview
- Area: 2.3 square miles
- Population: Approximately 3,500
- Zip Codes: 13619
- Latitude: 43.9787° N
- Longitude: 75.6060° W
Carthage, located along the Black River, is known for its rich history and small-town charm. Founded in the early 19th century, Carthage developed as an industrial center, with its mills powered by the Black River. The village played a significant role in the timber and paper industries, as well as in the production of iron and other goods. While many factories have since closed, Carthage has retained its historic charm, with well-preserved architecture and a tight-knit community atmosphere. The village’s proximity to Fort Drum also contributes to its vibrant local economy.
Education and Landmarks
Carthage Central School District serves the area, with Carthage High School offering a range of academic programs and extracurricular activities. Key landmarks include the Carthage Park, which offers picnic areas, playgrounds, and views of the Black River, and the Carthage Area Hospital, an important healthcare provider in the region. The annual Carthage Farmer’s Market and seasonal events bring the community together, celebrating local goods and crafts. Carthage’s combination of history, community events, and scenic beauty make it a welcoming town in Jefferson County.
Clayton
Overview
- Area: 84.4 square miles
- Population: Approximately 5,100
- Zip Codes: 13624
- Latitude: 44.2426° N
- Longitude: 76.0869° W
Clayton, situated along the St. Lawrence River, is known for its picturesque waterfront and as a gateway to the Thousand Islands region. Established in the early 19th century, Clayton was originally a shipping and trade center due to its strategic location on the river. Over time, the town transformed into a popular resort destination, attracting tourists to its scenic views and boating opportunities. Today, Clayton is a lively town with a blend of history, arts, and outdoor recreation, drawing visitors to explore the Thousand Islands and experience its waterfront charm.
Education and Landmarks
Thousand Islands Central School District serves the town, with Thousand Islands High School providing educational and extracurricular programs. Major landmarks include the Antique Boat Museum, which showcases vintage boats and offers river tours, and the Thousand Islands Arts Center, known for preserving traditional arts and crafts. Clayton hosts an annual Thousand Islands International Fishing Tournament, bringing anglers from across the region. With its historic attractions, riverfront beauty, and strong arts community, Clayton is a beloved town that captures the essence of the Thousand Islands.
Alexandria Bay
Overview
- Area: 1.5 square miles
- Population: Approximately 1,100
- Zip Codes: 13607
- Latitude: 44.3353° N
- Longitude: 75.9188° W
Alexandria Bay, a charming village located on the St. Lawrence River, is one of the main tourist destinations in the Thousand Islands region. Founded in the early 19th century, Alexandria Bay grew as a resort town, attracting visitors to its scenic river views, luxurious hotels, and waterfront activities. The village became a popular summer destination for vacationers, and many prominent families built elaborate summer homes on nearby islands. Today, Alexandria Bay remains a hub for tourism, offering boating, fishing, and access to the Thousand Islands.
Education and Landmarks
Alexandria Central School District serves the village, with Alexandria Central School providing K-12 education. Key landmarks include Boldt Castle, a stunning mansion built on Heart Island that draws thousands of visitors each year, and the Scenic View Park, which offers river views, picnic areas, and a beach. Alexandria Bay hosts Pirate Days, a popular annual event with reenactments, parades, and family-friendly activities celebrating the town’s heritage. With its historic charm, riverfront location, and vibrant tourism industry, Alexandria Bay is a gem in Jefferson County.
Adams
Overview
- Area: 2.3 square miles
- Population: Approximately 5,100 (including surrounding town)
- Zip Codes: 13605
- Latitude: 43.8081° N
- Longitude: 76.0223° W
Adams, located in the southern part of Jefferson County, is a small town with a rich agricultural heritage. Founded in the early 19th century, Adams grew as a farming community and was known for producing cheese, butter, and other dairy products. The town has retained its rural character while developing a small commercial center. Today, Adams is a quiet residential area with local businesses and community-oriented activities, providing a peaceful environment for its residents.
Education and Landmarks
South Jefferson Central School District serves Adams, with South Jefferson High School offering educational and extracurricular programs. Key landmarks include the Adams Country Club, a local golf course and community hub, and the nearby Sandy Creek, popular for fishing and outdoor activities. The annual Dairy Parade celebrates the town’s agricultural roots with floats, food, and festivities. With its rural charm, community events, and focus on agriculture, Adams is a welcoming town that values its small-town heritage.
Sackets Harbor
Overview
- Area: 2.5 square miles
- Population: Approximately 1,500
- Zip Codes: 13685
- Latitude: 43.9467° N
- Longitude: 76.1186° W
Sackets Harbor, located on the shore of Lake Ontario, is steeped in military history and known for its well-preserved historic sites. Founded in the early 19th century, Sackets Harbor was a strategic military base during the War of 1812 and became a prominent shipbuilding center. The village’s historic district, with its 19th-century buildings and waterfront views, attracts visitors interested in history and scenic beauty. Sackets Harbor is a vibrant village with a rich cultural scene, including art galleries, restaurants, and annual events.
Education and Landmarks
Sackets Harbor Central School District serves the village, with Sackets Harbor Central School providing K-12 education. Major landmarks include the Sackets Harbor Battlefield State Historic Site, which commemorates the War of 1812 and offers reenactments and exhibits, and Madison Barracks, a historic military complex now housing shops and residences. The village hosts an annual War of 1812 reenactment, celebrating its historical significance. With its historic charm, lakeside location, and commitment to preservation, Sackets Harbor is a popular destination in Jefferson County.
Evans Mills
Overview
- Area: 0.8 square miles
- Population: Approximately 600
- Zip Codes: 13637
- Latitude: 44.0894° N
- Longitude: 75.8079° W
Evans Mills, a small village located near Fort Drum, has a close-knit community and historic character. Founded in the early 19th century, the village developed around its grist and saw mills, which were powered by nearby streams. The presence of Fort Drum, a major military installation nearby, has greatly influenced Evans Mills, bringing economic growth and a diverse population. Today, Evans Mills offers a peaceful residential environment with easy access to amenities and activities in the surrounding areas.
Education and Landmarks
Indian River Central School District serves Evans Mills, with Indian River High School providing educational programs. Key landmarks include Evans Mills Speedway, a local racetrack that hosts stock car races and other events, and several small parks and trails offering outdoor recreation. The annual Evans Mills Festival features parades, food vendors, and entertainment, fostering community spirit. With its connection to Fort Drum and community events, Evans Mills is a welcoming village with a unique blend of history and modern influences.
Cape Vincent
Overview
- Area: 5.5 square miles
- Population: Approximately 2,700
- Zip Codes: 13618
- Latitude: 44.1312° N
- Longitude: 76.3327° W
Cape Vincent, located at the confluence of the St. Lawrence River and Lake Ontario, is a historic town known for its maritime heritage and scenic waterfront. Founded in the early 19th century, Cape Vincent developed as a trading and fishing port, with its location making it a vital link between the U.S. and Canada. The town has retained its waterfront charm and offers views of the Thousand Islands, attracting boaters, anglers, and tourists seeking a peaceful retreat along the river.
Education and Landmarks
Thousand Islands Central School District serves Cape Vincent, with schools in nearby Clayton. Notable landmarks include Tibbetts Point Lighthouse, a historic lighthouse offering tours and panoramic views of the river, and Burnham Point State Park, which provides camping, fishing, and boat access. The annual French Festival celebrates Cape Vincent’s French heritage with parades, live music, and food. With its historic sites, scenic views, and community events, Cape Vincent is a charming riverside town in Jefferson County.
