Wallabout Bay is a small body of water in Upper New York Bay along the northwest shore of the New York City borough of Brooklyn, between the present Williamsburg and Manhattan Bridges. It is located opposite Corlear's Hook in Manhattan, across the East River to the west. Wallabout Bay is now the site of the Brooklyn Navy Yard.
The nearby neighborhood of Wallabout, dating back to the 17th century, is adjacent to the bay. The neighborhood is a mixed use area with an array of old wood frame buildings, public housing, brick townhouses, and warehouses; it contains the historic Lefferts-Laidlaw House, which was added to the National Register of Historic Places in 1985.
The name of this curved bay on the western end of "Lang Eylandt" comes from the Dutch "Waal bocht", which means "Walloons' Bend", named for its first European settlers: the Walloons, from what is today Wallonia.