Caesarius

Caesarius may refer to:


 * Caesarius (consul) (fl. 386-403), Eastern-Roman politician
 * Caesarius of Africa (died c. 3rd century), a Christian martyr
 * Caesarius of Alagno (died 1263), a Roman Catholic priest, bishop and royal counsellor
 * Caesarius of Arles (468/470 – 542), ecclesiastic in Gaul
 * Caesarius of Heisterbach, 13th-century Christian
 * Caesarius of Nazianzus (c. 1180), physician and politician
 * Owain Caesarius, possibly Owain ap Dyfnwal (fl. 934)