| Country: | GRC |
| Type: | EO |
| Route: | 4α |
| Direction A: | South |
| Direction B: | North |
| Terminus B: | Skydra |
| Regions: | Central Macedonia |
| Cities: | Veria, Naoussa, Skydra |
Greek National Road 4a (Greek: Εθνική Οδός 4a, abbreviated as EO4a) is a dual carriageway road in northern Greece. It connects Veria with Skydra, passing through Naoussa.