The title is no longer in use by any of the main Christian churches having been united with other bishoprics.
In the 5th century, the Abbey of Kildare was founded by Saint Brigid, a double monastery of nuns and monks.
[1] Although the bishopric was founded with the abbey in the fifth century, it wasn't until 1111 AD that the diocese of Kildare was established at the Synod of Rathbreasail.
In the Church of Ireland, Kildare continued as an independent diocese until 1846 when it amalgamated with Dublin and Glendalough to form the united Diocese of Dublin, Kildare and Glendalough.
The bishops of Kildare had been apostolic administrators of Leighlin since 1683 and the union of the two sees was formally decreed on 29 November 1694.