Leontio is located in the Peloponnese region and more specifically in the regional unit of Corinth. It belongs to the municipality of Nemea (Local Community of Leonti, municipal community of Nemea). 

The official name is Leontion and seat of the municipality of Nemea. Formerly with the plan of Kapodistrias it belonged to the municipality of Nemea. Until 2010, the year in which the administrative division of Greece was formed according to the Kallikratis plan belonged to the Municipality of Nemea in the prefecture of Corinth. 

Geographically it belongs to the geographical department of Peloponnese, has an altitude of 351 meters, longitude 22.5919699150 and latitude 37.7946972103.