Kilbennen or Kilbannon is a medieval ecclesiastical site and National Monument located in County Galway, Ireland.

[1][2] Kilbennen is located 3.7 km (2.3 mi) northwest of Tuam, on the far side of the River Clare.

[3] The monastery here was founded by Benignus of Armagh (Benin, Benen, Bennan), a disciple of Saint Patrick,[4] in the 5th century AD, although the Book of Armagh associates it with a different Benignus, of the Luighne Connacht.

[7] In 1148 they record the death of Ceallach Ua Domhnagain, "noble head of Cill-Beneoin.

[citation needed] The church is surrounded by a wall and a graveyard, where some ancient crosses and slabs can be seen.