Greek National Road 7 (Greek: Εθνική Οδός 7, abbreviated as EO7) is a single carriageway with at-grade intersections in the Peloponnese region in southern Greece.

It connects the cities of Corinth and Kalamata, via Nemea, Argos, Tripoli and Megalopoli.

The EO51 is officially defined as a road through the centre of the Peloponnese, running between Corinth to the north and Kalamata to the south, via Nemea, Argos, Tripoli, and Megalopolis.

[1] Ministerial Decision G25871 of 9 July 1963 created the EO7 from the old EO53, which existed by royal decree from 1955–1963, and also followed the same route as the current EO7.

[2][1] Until 1975, the entirety of the EO7 formed part of the old European route E92.