Cairpre mac Laidcnén (died 793) was a king of the Uí Cheinnselaig of South Leinster.
[citation needed] In 780 warfare occurred between the Laigin and the high king Donnchad Midi.
Caipre cooperated with the Leinster king Ruaidrí mac Fáeláin (died 785) of the Uí Dúnlainge but they were defeated at the Battle of Óchtar Ocha (at Kilcock, near Kildare).
[2] Donnchad pursued them with his adherents, and laid waste and burned their territory and churches.
[3] In 782 Caipre seems to have given his support to Bran Ardchenn mac Muiredaig (died 795) in his bid for the Leinster throne versus Ruaidrí.