Washingtonian Hall, also known as Amos Patterson House, is a historic home located in Endwell in Broome County, New York.

It was moved a short distance from its original site in 1924 and subsequently remodeled in the Colonial Revival style.

Also on the property are contributing structures dating to the mid-1920s including a brick driveway, garden house and pergola.

There have been several additions and renovations over the years which retained the federal period architecture, moldings, and Palladian windows.

Amos and Ann Patterson purchased 600 acres of land as a part of the Boston Ten Townships for the location of their farm and Washingtonian Hall.