Poulton Priory or the Priory of St Mary was a Gilbertine priory in Poulton, Gloucestershire, England. It was founded as a chantry chapel in 1337 by Sir Thomas Seymour and became a house of Gilbertine canons in 1350.  From 1539, with the Dissolution of the Monasteries, the priory was used as the parish church for Poulton. It was demolished in 1873.
A Tudor style mansion was built on the site by Sir Arthur Blomfield for the Marshall family c1897. It was later owned by James Joicey and Major Alexander Black-Mitchell. In World War II, it was used as a children's hospital.
Coordinates: 51°41′56″N 1°51′50″W / 51.698975°N 1.863894°W / 51.698975; -1.863894 (Poulton Priory)