George C. Boldt Yacht House is a historic yacht house located on the northeast shore of Wellesley Island near Alexandria Bay in Jefferson County, New York.

[2] The yacht house was designed by the Philadelphia architects G. W. & W. D. Hewitt and built in 1903.

It is a massive, eclectic, Shingle-style structure composed of five elements, which are: The yacht house was listed on the National Register of Historic Places in 1978.

[1] On display in the yacht house is the steam yacht Kestrel, as well as various other vintage boats, a number of which are on loan from the Antique Boat Museum in Clayton, New York.

This article about a historic property or district in Jefferson County, New York, that is listed on the National Register of Historic Places, is a stub.