Abundius of Como was a fifth-century bishop who served the diocese in Northern Italy. Originally born in Thessaloniki, he succeeded Amantius as the fourth Bishop of Como around 448. During his ecclesiastical career, he represented Pope Leo the Great at the Council of Chalcedon in 451 to combat the Eutychian heresy. He also participated in the Council of Milan in 452. He is traditionally credited with the authorship of the hymn known as the Te Deum.