John Wells Pratt House, also known as Pratt House Museum, is a historic home and museum located at Fulton in Oswego County, New York. Built in 1863, it is a large two story residence in the Italianate style. The house is rectangular in plan with a three bay wide, three bay deep hipped roof main block with a gabled two story service wing. It features a cupola with round arched windows. A finely detailed Queen Anne style porch was added about 1880. It was listed on the National Register of Historic Places in 1999.