Blessed Mariano da Roccacasale (13 January 1778 – 31 May 1866) - born Domenico di Nicolantonio - was an Italian Roman Catholic professed religious from the Order of Friars Minor.
He was of peasant stock and entered the order in his twenties as a professed religious rather than as an ordained priest.
He was an influence in the decision of Blessed Giuseppe Oddi joining the Franciscans after their 1863 encounter.He became titled as a Servant of God under Pope Leo XIII on 12 December 1895 with the commencement of the canonization cause while becoming titled as Venerable in 1923 under Pope Pius XI; Pope John Paul II presided over the late Franciscan's beatification on 3 October 1999.