Ailsa Farms, also known as Haledon Hall and Hobart Manor, is an historic place located in Wayne, Passaic County, New Jersey, United States. Ailsa Farms was purchased by the state of New Jersey in 1948 from the family of Garret Hobart, 24th vice president of the United States. It now is the campus of William Paterson University. The original manor house, built in 1877, was the weekend retreat and summer residence of the Hobart family. It was greatly expanded in 1915 following a design by Paterson architect Fred Wesley Wentworth. Today the building is known as Hobart Manor and is home of the Office of the President and the Office of Institutional Advancement. Ailsa Farms was added to the National Register of Historic Places on April 30, 1976.