Major mints: Argos, Epidauros, Troezen.

In the northeastern Peloponnesos, is chief city was Argos. This was the largest and, before the rise of Sparta, the most powerful city in the Peloponnesos. Its roots go back a long way; the Argive plain was home to the Late Bronze Age cities of Mycenae and Tiryns, and was the land of Agamemnon in the Iliad.

Argos has an extensive issue of coins, which have the forepart of a wolf on the obverse. This is from the cult of Wolf Apollo; the legend, as Pausanios relates it, involves a dispute over the kingship settled by Apollo, who sent a wolf to attack a bull; the wolf won its fight, and the wolf was held to represent one candidate (Danaos) and the bull, the other. Danaos naturally dedicated a temple to the deity which gave him his throne. In terms of its history, after its defeat by the Spartans sometime around 494 BC, its main claim to fame was to be the town in which Pyrrhos died, when he was struck on the head by a tile.

Also in the Argolid was the site of the Nemean games in the sanctuary of Zeus at Nemea, where Panhellenic contests were held from 573 BC on. Nemea was the site of Herakless first labor, the destruction of the Nemean lion. This lion was protected by an invulnerable hide, so eventually Herakles throttled it with his bare hands.

Troezen used a trident head as its city symbol on its silver drachms. Its patron deity was Poseidon, who is said to have killed Hyppolytos by causing his chariot-horses to bolt; this is because his father Theseus, believing (wrongly) that Hyppolytos had attempted to assault his stepmother Phaedra, had called on his father Poseidon to punish him.