East Orchard Castle is a ruined building near St Athan in the Vale of Glamorgan, Wales, whose remains date mainly from the 14th century.

[1] While it is called a castle, it was not fortified in the style of one and is officially classed as post-medieval and broadly defined as a domestic manor house dwelling.

The Orchards were built by the Berkerolles family, who received the land from Robert Fitzhammon after the conquest of Glamorgan 1091.

[1] The Royal Commission on the Ancient and Historical Monuments of Wales have a number of drawings of East Orchard Castle.

There is a small stone bridge over a run-off of the river thaw that is likely related to the build of the castle (see image below).