Derrynaflan Church, Medieval church ruin in County Tipperary, Ireland

Derrynaflan Church is a medieval monastery church ruin located in County Tipperary, standing on elevated ground within bogland. The remaining stone walls feature five window openings and the foundation lines of the nave are still visible.

The monastery was founded in the 6th century under the guidance of Ruadhán of Lorrha, with support from the King-Bishops of Cashel. This establishment grew into a major center of religious and intellectual life during Ireland's early medieval period.

The name Derrynaflan comes from the Irish for "oak grove of the Flanns", earlier Daire Eidnech, "ivied oak grove". A stone slab found here, now in the National Museum of Ireland – Archaeology, is inscribed OR DOAN MAIN DVBSCVLL, a prayer for the soul of Dubscuile. A Franciscan community lived at the site between 1676 and 1717.

The ruins are open to visitors during daylight hours with no entrance fee required. You can reach the site easily by following the road network that connects to County Tipperary's main routes.

The hoard found here in 1980 held a chalice, paten, strainer and stand, buried in the 8th or 9th century. A stone slab from the site, now in the National Museum of Ireland – Archaeology, asks for a prayer for the soul of Dubscuile. To the northeast lies a burial site said to be that of the legendary Gobán Saor.