Caecilius

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