Kilseily (Irish: Cill tSíle[1]) is a civil parish in County Clare, Ireland.

[3] Clonlea, Kilseily and part of O'Brien's Bridge (Trúgh) used to comprise the district of Ui Floinn, the land of the O'Flynns.

This sept is little known, but there is a mention in MacGrath's Wars of Thormond of the battle of Magh Duine around 953 in which Lachtna, uncle of Brian Boroimhe, slew three of the O'Flynns.

[4] Part of Killokennedy was amalgamated with Kilseily to form what is now the parish of Broadford in the Roman Catholic Diocese of Killaloe.

[5] Townlands are Ahaclare, Ardskeagh, Ballykelly, Cloonsheerea, Cloontra, Cloontra East, Cloontra West, Coolagh, Crag, Derryvinnaan, Derry, Doon, Drummin, Drumminakela, Drumsillagh or Sallybank (Merritt), Drumsillagh or Sallybank (Parker), Gortacullin, Gortnaglogh, Gortnagonnella, Hurdleston, Killaderry (Massy), Killaderry (O'Brien), Kilmoculla, Kilseily, Knockshanvo, Kyle, Meanagh, Mountrice, O'Shea's Acres, Snaty (Cooper), Snaty (Massy), Snaty (Wilson), Violethill and Woodfield.