Ogmore Castle (Welsh: Castell Ogwr) is located near the village of Ogmore-by-Sea, south of the town of Bridgend in Glamorgan, South Wales. It is situated on the south bank of the River Ewenny and the east bank of the River Ogmore. Cowbridge is nearby. Its construction might have begun in 1106. Ogmore was one of three castles built in the area in the early 12th century, the others being Coity Castle and Newcastle Castle. It was in use until the 19th century for a range of purposes, including a court of justice and a prison, but is now a substantial set of remains and a local landmark.