Leo I of Cava was an 11th-century Italian abbot and bishop who served the Abbey of La Trinità della Cava. Born in Lucca around 950, he joined the monastery and eventually succeeded Alferius as its second abbot. During his leadership, he helped increase the religious and social impact of the community while reinforcing the Benedictine rule. He died in Cava de' Tirreni in 1079.