Watton Priory was a priory of the Gilbertine Order at Watton in the East Riding of Yorkshire, England. The double monastery was founded in 1150 by Eustace fitz John. The present building dates mainly from the fourteenth and fifteenth centuries. A house was added in the nineteenth century. It is a Grade I listed building. King Edward I of England imprisoned young Scottish Princess Marjorie Bruce there after her capture until eight years later, when he himself died.