In Greek mythology, the name Clonius (/ˈkloʊniəs/; Greek: Κλονίος) may refer to:
Clonius, one of the Achaean leaders in the Trojan War, son of either Alegenor, or of Alector and Acteis, or of Lacritus and Cleobule, and in the latter case brother of Leitus; he came from Boeotia and commanded nine ships. He was killed by Agenor.
Clonius, an illegitimate son of Priam.
Clonius, a companion of Aeneas, who was killed by Turnus.
Clonius, another companion of Aeneas, who was killed by Messapus.
Clonius, a defender of Thebes against the Seven, killed by Tydeus.
