Saint Marcellus may refer to:
Pope Marcellus I (255–309) Marcellus of Capua (c. 3rd or 4th century) Marcellus of Paris (died 436) Marcellus of Tangier (c. mid 3rd century–298)
See also Marcel (disambiguation) Saint-Marcel (disambiguation) Saint-Marcellin (disambiguation)
fr:Saint Marcel it:San Marcello