Michael Slattery (1783–1857) was a Roman Catholic clergyman who served as the Archbishop of Cashel & Emly from 1833 to 1857. He was born at Tipperary Town in Ireland in 1783, and was educated at the Abbey School there. He entered Trinity College Dublin when only fifteen years of age, one of the first Catholics to do so, earning a Bachelor of Arts degree in 1804. He then decided to become a Roman Catholic priest, and was enrolled at the St. Patrick's, Carlow College. He was ordained in 1809, and continued at Carlow as a professor of philosophy and of Moral Theology.