Affeton Castle is a surviving late-medieval gatehouse near East Worlington, Devon, England which overlooks the Little Dart River in Devon and was originally built from grey rubble stone by the Stucley Baronets in around 1434. Originally part of a large manor complex, this castellated gatehouse, by wide, formed a major part of the defences of the house. The castle's most notable former resident during the period was Thomas Stucley, an Elizabethan traitor. Ruined during the English Civil War after being sacked several times, the castle was renovated in either 1860 or 1868, producing the current building.