The Judah Baker Windmill is an 18th-century windmill in South Yarmouth, Massachusetts. It was named after its original builder, Judah Baker, who constructed the mill in 1791. Like many Cape Cod windmills, the windmill experienced several moves before moving to its current location at 89 River Street in Bass River, located within the Historic District of South Yarmouth. The windmill faces west to Bass River, adjacent to the waters of Nantucket Sound, and is located on an area with a small boardwalk and beach.