Greek National Road 1

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National Road 1
Εθνική Οδός 1
Major junctions
South end	central Athens
North end	North Macedonia border at Evzonoi
Location
Country	Greece
Regions	Attica, Central Greece, Thessaly, Central Macedonia
Major cities	Athens, Lamia, Larissa, Katerini, Alexandreia, Polykastro
Highway system
Highways in Greece Motorways National Roads

Greek National Road 1 (Greek: Εθνική Οδός 1, abbreviated as EO1) is the old single carriageway road connecting Athens with Thessaloniki and Evzonoi, the border crossing between Greece and North Macedonia. For most of its length, it has been replaced by the new A1 motorway.