In Greek mythology, Argus (/ˈɑːrɡəs/; Greek: Ἄργος 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.
Argus married either Evadne, the daughter of Strymon and Neaera, or Peitho the Oceanid, and had by her six sons: Criasus, Ecbasus, Iasus, Peiranthus (or Peiras, Peirasus, Peiren), Epidaurus and Tiryns (said by Pausanias to be the namesake of the city Tiryns). According to Pausanias, yet another son of Argus was the Argive Phorbas (elsewhere his grandson through Criasus).
The tomb of Argus in Argos was shown as late as the times of Pausanias, who also made mention of a grove sacred to Argus in Lacedaemon where some from the Argive army took refuge after being defeated by Cleomenes I, and were subsequently burned to death therein.