The Antique Boat Museum is a museum on the St. Lawrence River, in Clayton, New York, United States, which displays the largest collection of antique and classic boats in North America. Each year, the museum hosts the United States' oldest Antique Boat Show & Auction during the first weekend of August. It is also the site for the biennial Antique Raceboat Regatta. The museum has seasonal hours and is open mid-May to mid-October.