Greek National Road 15 (Greek: Εθνική Οδός 15), abbreviated as the EO15, is a national road in northern Greece. It connects Agios Germanos, near the border with North Macedonia, with the Greek National Road 6 near Kalampaka. It passes through Kastoria, Siatista and Grevena.

National Road 15 near Grevena. The bridge seen is from the A2 motorway.

History

Ministerial Decision G25871 of 9 July 1963 created the EO15 from all or part of the following short-lived national roads (listed from south to north), which existed by royal decree from 1955 to 1963:

40°10′58″N 21°29′51″E/40.1827°N 21.4975°E/ 40.1827; 21.4975