John J. O'Meara (18 February 1915 – 12 February 2003) was an Irish philosopher and theologian, considered one of the great scholars of Augustine of Hippo.
O'Meara was born in Eyrecourt to Mary Donnellan of Loughrea and Patrick O'Meara of Cappagh, Portumna. Educated in Eyrecourt and Ballinasloe and University College Dublin, graduating with an M.A. in 1939. He held posts in, and lectured at, St Stanislaus College(Tullamore), Clongowes Wood College, Oxford, Dublin, the Sorbonne and Princetown. He married Odile de Barthas de Montfort in Paris in 1949.
Notable former students
- The Young Augustine:the growth of St. Augustine's mind up to his conversion, London, 1954
- Porphyry's philosophy from Oracles in St. Augustine, Paris, 1959
- Charter of Christendom:the Significance of St. Augustine's city of God, New York, 1962
- Augustine and Toynbee:Essays presented to H. Caplan, Cornell, n.d.
- Reformation in Education, a pamphlet, n.d. Dublin: Mount Salus Press, 1958.
- Recherches Augustiniennes, with Councelle, Mohrmann and others, Paris, 1958
- Ordeal at Lourdes, with Odile de Monfort O'Mara, Caption Press, 1959
- Giraldus Cambrensis. Topography of Ireland, translation, introduction, commentary, 1951
- The Voyages of St. Brendan;journey to the promised land, translation and introduction, 1976