Following the death of Murphy on 7 October 1996, Buckley was appointed diocesan administrator on 10 October.[6]
Bishop of Cork and Ross
Buckley was appointed Bishop of Cork and Ross by Pope John Paul II on 19 December 1997.[7]
He was installed on 8 February 1998 at the Cathedral of St Mary and St Anne, Cork.[8]
Following his installation, Buckley did not move into the episcopal palace, continuing to live at a house in Turners Cross instead.[3] He is also noted for promising in 2006 to personally invite Pope Benedict XVI to Cork, were the county senior hurling team to win a third All-Ireland championship in succession, a feat which ultimately was not achieved.[9]
Buckley also supported calls by campaigners to make a mass grave for Magdalene women at Sunday's Well more accessible to the public, which followed his call for the remains of Little Nellie, considered the "unofficial patron saint of Cork", to be exhumed.[10]
During his episcopate, Buckley also served as a member of the commission for pastoral care of the Irish Catholic Bishops' Conference, and chaired its council on healthcare.[8]
Retirement
In accordance with canon law, Buckley submitted his episcopal resignation to the Congregation for Bishops on his 75th birthday on 2 November 2014, but was expected to remain in the see until a successor was appointed.[4]
He remained in the see until the appointment of his successor, Fintan Gavin, on 8 April 2019.[2][11]