Hangthwaite Castle was an earthwork motte and bailey castle founded by Nigel Fozzard. It stood in the 11th century and is situated just north of Scawthorpe, Doncaster, South Yorkshire, England. In the 13th century, a fortified house called Radcliffe Moat () replaced Hangthwaite Castle as a local fortification. Nowadays, only the motte and the ditches remain. Encased by the wide wet ditch, the motte defends a bean-shaped eastern bailey and a small north-western mound, which is possibly a barbican.