Saint Domninus of Fidenza is an Italian Catholic saint. According to tradition, he died in 304 AD and was a native of Parma. The cathedral in Fidenza is dedicated to him. The Hieronymian Martyrology commemorates Domninus, but does not include any further information about him, and his feast day is cited as occurring on 9 October. He is not commemorated in the martyrologies of Bede, Ado, Notker, or the Parvum Romanum.