Pisa (Ancient Greek: Πῖσα) is a village situated 2.15 kilometres (1.34 mi) to the east of Olympia, Greece, located on the northwest side of the Peloponnesus peninsula.

A confederacy of eight states apparently existed in Pisatis, of which, besides Pisa, the following names are recorded: Salmone, Heracleia, Harpinna, Cycesium, and Dyspontium.

The Virgilian commentator Servius wrote that the Teuti, or Pelops, the king of the Pisatans, arrived on the Tyrrhenian coast after the Trojan War and founded the Italian (and more famous) Pisa in the 13th century BCE.

In the eighth Olympiad (747 BCE) the Pisatans succeeded in depriving the Eleians of the presidency by calling in the assistance of Pheidon I, king of Argos, in conjunction with whom they celebrated the festival.

In this war the Pisatans were commanded by their king Pantaleon, who also succeeded in making himself master of Olympia by force, during the 34th Olympiad (644 BCE), and in celebrating the games to the exclusion of the Eleians.

But in the 52nd Olympiad (572 BCE), Pyrrhus, who had succeeded his brother Damophon in the sovereignty of Pisa, invaded Elis, assisted by the Dyspontii in the Pisatis, and by the Macistii and Scilluntii in Triphylia.