This page serves as an index of lists of kings of the Gaelic kingdoms of Ireland of the Early Medieval period.

• List of High Kings of Ireland
• Kings of Ailech
• Kings of Airgíalla
• Kings of Brega
• Kings of Breifne
• Kings of Connacht
• Kings of Dál nAraidi
• Kings of Dál Riata
• Kings of Déisi Muman
• Kings of Desmond
• Kings of Dublin
• Kings of East Breifne
• Kings of Fer Manach
• Kings of Leinster
• Kings of Magh Luirg
• Kings of Mide
• Kings of Munster
• Kings of Osraige
• Kings of Síol Anmchadha
• Kings of Tara
• Kings of Thomond
• Kings of Tír Chonaill
• Kings of Tír Eoghain
• Kings of Uí Cheinnselaig
• Kings of Uí Failghe
• Kings of Uí Maine
• Kings of Uisnech
• Kings of Ulster
• Kings of West Breifne