Luke Wadding, O.F.M. (16 October 1588 – 18 November 1657), was an Irish Franciscan friar and historian.
Wadding was born on 16 October 1588 at Waterford to Walter Wadding of Waterford, a wealthy merchant, and his wife, Anastasia Lombard (sister of Peter Lombard, Archbishop of Armagh and Primate of Ireland). Educated at the school of Mrs. Jane Barden in Waterford and of Peter White in Kilkenny, in 1604 he went to study in Lisbon and at the University of Coimbra.
After completing his university studies, Wadding became a Franciscan friar in 1607, and spent his novitiate at Matosinhos, Portugal. He was ordained priest in 1613 by João Manuel, Bishop of Viseu, and in 1617 he was made President of the Irish College at the University of Salamanca, and Master of Students and Professor of Divinity. The next year, he went to Rome as chaplain to the Spanish ambassador to the Papal States, Bishop Antonio Trejo de Sande, O.F.M. Wadding collected the funds for the establishment of the College of St. Isidore in Rome, for the education of Irish priests, opened 24 June 1625, with four lecturers — Anthony O'Hicidh of a famous literary family in Thomond, Martin Breathnach from Donegal, Patrick Fleming from Louth, and John Punch from Cork. He gave the college a library of 5,000 printed books and 800 manuscripts, and thirty resident students soon came. Wadding served as rector of the college for 15 years. From 1630 to 1634, he was Procurator of the Order of Friars Minor at their headquarters in Rome, and Vice Commissary from 1645 to 1648.