Greek National Road 13 (, abbreviated as EO13) is a single carriageway road in northern Greece. It connects Katerini with the Greek National Road 3 at Mikro Eleftherochori, 8 km north of Elassona.
The road passes through the following places:
Ministerial Decision G25871 of 9 July 1963 created the EO13 from the old EO80, which existed by royal decree from 1955 until 1963, and followed the same route as the current EO13.