In Greek mythology, Argus (; Argos) was the king and eponym of Argos. He was a son of Zeus and Niobe, daughter of Phoroneus, and is possibly the brother of Pelasgus. Argus succeeded to his maternal grandfather's power over Peloponnese, naming the kingdom after himself. A scholiast on Homer calls Argus the son and successor of Apis. Jerome and Eusebius, citing the now-lost history of Castor of Rhodes, also agree in making Argus the successor of Apis, and son of Zeus and Niobe, and give the length of his reign over "Argeia" (Argos) as 70 years.