Laurence Gillooly CM (May 12, 1819 – January 12, 1895) was an Irish Roman Catholic bishop who served as the Bishop of Elphin from 1858 to 1895.^[1] The son of Laurence Gillooly and his wife Margaret (née McGann), he was born at Bothair Garbh, Gallowstown, County Roscommon, near Roscommon Town. His older brother, Timothy, also became a priest.

Brought up an Irish Catholic, he was educated locally in Roscommon, and at St Nathy's College in Ballaghadereen. He studied at the Irish College in Paris before ordination as a Vincentian Priest in 1847.^[2] Favoured by Cardinal Cullen, his status as a ultramontanist helped him to obtain the position of bishopric of Elphin.^[3]

During Dr Gillhooly's time in Elphin, he developed many churches, including the re-development of Sligo Cathedral. He founded Summerhill College (originally outside Athlone, now in Sligo) as a Diocesan College. Gillhooly Hall is named after him.