The Bishop of Kildare was an episcopal title which took its name after the town of Kildare in County Kildare, Ireland. The title is no longer in use by any of the main Christian churches having been united with other bishoprics. In the Roman Catholic Church, the title has been merged with that of the bishopric of Leighlin and is currently held by the Bishop of Kildare and Leighlin. In the Church of Ireland, the title has been merged with that of the bishopric of Meath and is currently held by the Bishop of Meath and Kildare.

The Bishop of Kildare and Leighlin is the ordinary of the Roman Catholic Diocese of Kildare and Leighlin, one of the suffragan dioceses of the Archdiocese of Dublin. The episcopal title takes its name from the towns of Kildare and Old Leighlin in the province of Leinster, Ireland.