In November 1950 Lucey was appointed titular bishop of Sila and auxiliary bishop of Cork with right of succession, and was consecrated bishop the following January. Upon the death of
Bishop Cohalan, in August 1952, Lucey became Bishop of Cork. During his tenure, he founded a total of thirteen churches in Cork. He founded the St. Anne's
Adoption Society in 1954. His outspoken sermons, often given at
confirmations, made him something of a thorn in the side of the establishment. His views on matters of faith and morals were conservative, and he was involved in a controversy in the 1960s, when he withdrew the diocesan faculties of Father James Good, a lecturer at
University College, Cork, for publicly dissenting from the teaching of
Pope Paul VI. In 1965 Bishop Lucey started the Cork diocesan
mission to
Peru, where many priests from Cork ministered. The last of the Irish missioners returned from
La Esperanza to Ireland in 2004. ==African Ministry in Retirement==