Title: Visit Jefferson County: 2026 Travel Guide for Jefferson County, New York | Expedia.com

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# Jefferson County, NY

## New York

![Boldt Castle. NY

#ontheroad](https://images.trvl-media.com/place/10739/874d3d6e-e99b-4dfa-89c9-1c985da3fd61.jpg?impolicy=fcrop&w=1040&h=580&q=mediumHigh)

![Boldt Castle. NY

#ontheroad](https://images.trvl-media.com/place/10739/874d3d6e-e99b-4dfa-89c9-1c985da3fd61.jpg?impolicy=fcrop&w=1040&h=580&q=mediumHigh)

![Lake Ontario and the St Lawrence River are at a 100 year historic high. It is anticipated that levels will not drop to normal  until December! There is lots of devastation all along the shoreline. Homes, streets, docks and swim beaches under water. ](https://images.trvl-media.com/place/6340108/5f059e17-c058-4c7e-840c-9175320c8e00.jpg?impolicy=fcrop&w=1040&h=580&q=mediumHigh)

![Thousand Island Region New York- Boldt Yacht House](https://images.trvl-media.com/place/10739/172579db-ca58-4156-90d4-b8c58bd2fbc3.jpg?impolicy=fcrop&w=1040&h=580&q=mediumHigh)

![French Bay](https://images.trvl-media.com/place/183654/e6b25bc7-68a8-4b3f-be1a-6c4e5233deb8.jpg?impolicy=fcrop&w=1040&h=580&q=mediumHigh)

### Popular cities in Jefferson County

[Alexandria Bay

Known for Castle, Historical and Rivers

](https://expedia.com/Alexandria-Bay.dx10739)

Come to Alexandria Bay and enjoy its island views, castle, and history. 

## Reasons to visit

- Boldt Castle
- Keewaydin State Park

[Explore City](https://expedia.com/Alexandria-Bay.dx10739)[Find Hotels](https://expedia.com/Alexandria-Bay-Hotels.d10739.Travel-Guide-Hotels)

[Henderson

Known for Business, Dining and Shopping

](https://expedia.com/Henderson.dx6218576)

Escape to Henderson! Enjoy its food and parks. 

## Reasons to visit

- Southwick Beach State Park

[Explore City](https://expedia.com/Henderson.dx6218576)[Find Hotels](https://expedia.com/Henderson-Hotels.d6218576.Travel-Guide-Hotels)

[Watertown

Known for Shopping, Dining and Sports

](https://expedia.com/Watertown.dx417)

Escape to Watertown! Enjoy its baseball, university life, and library. 

[Explore City](https://expedia.com/Watertown.dx417)[Find Hotels](https://expedia.com/Watertown-Hotels.d417.Travel-Guide-Hotels)

[Clayton

Known for Friendly people, Rivers and Ports

](https://expedia.com/Clayton.dx183654)

Explore Clayton: its riverfront, coffee, sunsets, and more! 

[Explore City](https://expedia.com/Clayton.dx183654)[Find Hotels](https://expedia.com/Clayton-Hotels.d183654.Travel-Guide-Hotels)

[Wellesley Island

Known for Islands, Castle and Historical

](https://expedia.com/Wellesley-Island.dx6190524)

Trip time! Discover the island views, castle, and hiking in Wellesley Island. 

[Explore City](https://expedia.com/Wellesley-Island.dx6190524)[Find Hotels](https://expedia.com/Wellesley-Island-Hotels.d6190524.Travel-Guide-Hotels)

[Cape Vincent

Known for Friendly people and Rivers

](https://expedia.com/Cape-Vincent.dx6340108)

Explore Cape Vincent: its riverfront and more! 

[Explore City](https://expedia.com/Cape-Vincent.dx6340108)[Find Hotels](https://expedia.com/Cape-Vincent-Hotels.d6340108.Travel-Guide-Hotels)

![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh)

## 

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