Punchestown Longstone is a menhir (standing stone) and national monument near Naas in Ireland.

The Longstone is located about 3.5 km (2 mi) southeast of Naas, and about 600 m north of Punchestown Racecourse, in a field just off the Craddockstown road.

The nearby Longstone at Forenaghts Great also had a trapezoidal cist which contained cremated human remains, pottery, and a fragment of a wristguard, a typical Beaker find.

In 1981, a Bronze Age cist burial containing the cremated remains of four people were found 700 m (800 yd) east of the Longstone.

[2][3] The stone (and several others nearby) are mentioned in Gerald of Wales' 1188 Topographia Hibernica: Latin: Fuit antiquis temporibus in Hibernid lapidum congeries admiranda, quae et Chorea Gigantum dicta fuit; quia Gigantes eam ab ultimis Affricae finibus in Hiberniam attulerant, et in Kildarensi planitie, non procul a castro Nasensi, tam ingenii quam virium ope mirabiliter erexerant.