Caecilius may refer to:
*
Caecilia gens, an ancient Roman family, including a list of people with the name
**
Lucius Caecilius Iucundus, a Roman inhabitant of Pompeii, and central character in the Cambridge Latin Course series
*
''Caecilius'' (insect), a genus of insect
*
Kusaila (Latin: ''Caecilius''), a 7th-century Berber king
See also
*
*
Caecilian, a type of amphibian
** ''
Caecilia'', a genus of amphibians in the family Caeciliidae
*
Kaecilius, a fictional supervillain in Marvel Comics
{{disambiguation