Ogmore Castle, situated near the village of Ogmore-by-Sea, south of the town of Bridgend in Glamorgan, South Wales, was initially constructed in 1116 by William de Londres, one of the legendary Twelve Knights of Glamorgan, as part of the Norman invasion of Wales.
It is one of three castles built by the Normans in the area at the time, the others being Coity Castle and Newcastle, Bridgend.
Ogmore Castle is situated on the south bank of the River Ewenny shortly before it joins with the River Ogmore.
The castle 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 local landmark. A popular set of stepping stones cross the river near to the castle site and a footpath leads to the village of Merthyr Mawr.