Killeigh (Irish: Cill Aichidh, meaning "church of the field")[2] is a village in County Offaly, Ireland.

[1] An abbey, historically associated with St Sinchell, was reputedly founded at Killeigh (from Irish Cill Aichidh, meaning 'church of the field') in the 6th century.

[8] The local Catholic church, which is dedicated to Saint Patrick,[9] is in the Diocese of Kildare and Leighlin.

[13] A holy well and rag tree, associated with St Sinchell,[4] is located in Killeigh townland and contains architectural fragments from the nearby monastic site.

[1] Killeigh was the birthplace of the racing greyhound 'Mick the Miller', and a statue has been placed on the village green to commemorate this dog.