Vinegar Bend is an unincorporated census-designated place in Washington County, Alabama, United States. Vinegar Bend is 15 miles south-southwest of Chatom. As of the 2010 census, its population was 192. 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.