Van Wyck-Lefferts Tide Mill (/vænˈwaɪk/van WYKE) is a historic tide mill located at Lloyd Harbor in Suffolk County, New York. It was built about 1793 and is a 3+1⁄2-story, gable-roofed, timber-framed rectangular building little altered since the early 19th century. The property also includes the earthen mill dam with sluice gates.[2] The Lefferts Tide Mill and Preserve, which owns the mill, partners with the Huntington Historical Soceiety, offers boat tours to the site and tours of the Tide Mill from May through October.[3]