Moorstown Castle is a late 15th-century stone structure consisting of an enclosed circular keep near Clonmel, County Tipperary, Ireland.

[1] Moorstown Castle was built by James Keating, an ally of the Earl of Ormond.

The castle and associated lands passed, under a mortgage agreement, to Robert Cox of Bruff in 1635, and then by marriage to the Greene family.

The bawn, built with limestone facing inside and outside, and a rubble core, has two defensive towers, to the southwest and northeast, and a fortified gatehouse with residential space for guards.

[1] Moorstown Castle was one of the Tipperary locations used in Stanley Kubrick's 1975 epic film Barry Lyndon.