Thelpusa or Thelpousa (Greek: Θέλπουσα, also known as Telphusa/Τέλφουσα or Thelphusa/Θέλφουσα) was an ancient city-state in Azania in Arcadia.
The city was built on the left bank of the Ladon and bounded with Kleitor and Psophis. The name comes from the nymph Thelpousa or Thelpusa, daughter of Ladon. The city contained the temple of Eleusinian Demeter, and nearby, a stone statue of the goddess of the daughter and Dionysus and Ongius, chief of Thelpousa and the son of Apollo, Asclepius' children with the memory of Trygon and the temple of the twelve gods. When Pausanias visited the city, Thelpousa was abandoned and ruined for many years. In 352 BC, its city residents took part with the Lacedaemonians. It was the member of the Achaean League and was cut off from the rights of law. The legal system had with Demeter and the son of Arion. Thelpusa was the patriot of Asclepius and Artion.[1]