Hailes Abbey is a former Cistercian abbey, in the small village of Hailes, two miles northeast of Winchcombe, Gloucestershire, England. It was founded in 1246 as a daughter establishment of Beaulieu Abbey. The abbey was dissolved by Henry VIII in 1539. Little remains of the abbey. It is a Grade I listed building and a scheduled monument.
The site is owned by the National Trust but managed by English Heritage. There is a museum on the site holding many artefacts from the Abbey.