Prittlewell Priory is a medieval priory in the Prittlewell area of Southend, Essex, England. It was founded in the 12th century, by monks from the Cluniac Priory of St Pancras and passed into private hands at the time of the dissolution of the monasteries under Henry VIII. The last private owner, R. A. Jones, gave the priory and the grounds to the local council. The grounds now form a public park, Priory Park, and the Grade I listed building is open to the public.