Until the early twelfth century, the Kingdom of Meath had been divided into eight small monastic episcopal sees, which were located at Clonard, Duleek, Kells, Trim, Ardbraccan, Dunshaughlin, Slane, and Fore.
By the time of the Synod of Rathbreasail, held in 1111, the last five had been united to the see of Clonard.
Duleek was still recognized as a separate bishopric at the Synod of Kells, held in 1152, but disappeared not long after that date.
In the Church of Ireland, the bishopric of Clonmacnoise became part of Meath in 1569.
The Catholic bishop's seat is located at Christ the King Cathedral, Mullingar.