Vinegar Bend is an unincorporated census-designated place in Washington County, Alabama, United States. Vinegar Bend is 15 miles (24 km) south-southwest of Chatom. As of the 2020 census, Vinegar Bend had a population of 178. Vinegar Bend had a post office with ZIP code 36584 until it was closed July 1, 2010. When the bridge on the "main" road into Vinegar Bend was closed for repairs, the USPS closed the post office for good.