Hook Windmill, also known as Old Hook Mill, is a historic windmill on North Main Street in East Hampton, New York. It was built in 1806 and operated regularly until 1908. One of the most complete of the existing windmills on Long Island, the windmill was sold to the town of East Hampton in 1922. The building was listed on the National Register of Historic Places in 1978 and is part of the North Main Street Historic District. The mill was renamed the "Old Hook Mill" and is open daily to visitors. The Windmill is among the 11 other surviving 18th and early 19th century wind-powered gristmills located on Long Island. It was built by Nathaniel Dominy V, a well-known East Hampton craftsman.