Alfonso Muzzarelli (22 August 1749, Ferrara – 25 May 1813, Paris) was an Italian Jesuit theologian and scholar.
After the suppression of the order in 1773 he received a benefice at Ferrara and, somewhat later, was made director of the Collegio dei Nobili at Parma.
His chief production is a collection of philosophico-theological treatises published repeatedly under the title Il buon uso della Logica in materia di Religione (6 vols., Foligno, 1787–9), with additions by the author (10 vols., Rome, 1807; 11 vols.
The collection contains sketches on the theological questions on the day such as - abuses in the Catholic Church, the temporal power of the pope, religious toleration, ecclesiastical immunity, riches of the Catholic church and its clergy, primacy and infallibility of the pope, auricular confession, religious institutes, indulgences, Gregory VII, moral liberty, etc.
This collection of treatises, with the exception of the last five, was translated into Latin by Zeldmayer de Buzitha (Bonus usus logiae in materia religionis, Kaschau, 1818–7).