the United States
Private Islands for Sale in New York
The Thousand Islands region of the St. Lawrence River is the most developed private island market in the country, with a history of island cottages dating back more than a century. Islands range from single-cottage rocks to substantial estates.
Because ownership here is long established, many islands already have power connections, docks and boathouses, and local contractors are experienced in island logistics.
Highlights
- Long-standing island ownership culture with mature infrastructure
- Many properties connected to mainland power
- Experienced local marine contractors and services
- Short crossings and a well-served mainland shoreline
Considerations
- River currents and ice movement affect dock and boathouse design
- Cross-border proximity to Canada has practical implications for boaters
- Seasonal use is standard, with winter access limited
- Historic structures may need updating to current codes
Frequently asked questions
Do Thousand Islands properties have grid power?
Many do, via submarine cable, which is a significant advantage compared with most island markets.
How long is the season?
Typically late spring through early autumn, with some owners extending into shoulder seasons.
Other areas in the United States
AreaFloridaPrivate islands in Florida: bay and spoil islands, strict environmental regulation, buildable area and hurricane considerations.AreaMainePrivate islands in Maine: granite coastal islands, conservation traditions, seasonal access and off-grid development.AreaMichiganPrivate islands in Michigan: Great Lakes and inland lake islands, cottage infrastructure and seasonal access.AreaAlaskaPrivate islands in Alaska: large remote coastal holdings, floatplane access and genuinely off-grid ownership.