Van Alstyne House, also known as (Van Alstyne Homestead and Fort Rensselaer Club), is a historic home located at Canajoharie in Montgomery County, New York. It is a long, low rectangular house with a steeply pitched gambrel roof in the Dutch Colonial style. The original fieldstone house was built about 1730 and has three rooms with a garrett under the roof. A 2 1⁄2-story frame addition runs across the rear.It was added to the National Register of Historic Places in 1983.