The community spreads in the place where the Isthmian Games were held in antiquity.

Isthmia is located in an area where the Isthmian Games were held.

The Isthmian Games started in 582 BC and finished during 5th century AD.

In modern times, Isthmia was a small village.

Today it is a community, including five settlements Isthmia, Kyras Vrysi, Kalamaki, Paradeisos, Agios Charalampos and Kavos.