| Type: | I |
| Route: | 4 |
| Map: | Bulgaria roadmap bg I-4.svg |
| Map Notes: | I-4 road highlighted in orange |
| Country: | BGR |
| Length Km: | 264.3 |
| Terminus A: | , Yablanitsa |
| Terminus B: | , Shumen |
| Cities: | Lovech, Targovishte |
Republic road I-4 is a major road in Northern Bulgaria. It runs between I-3 road, at 5.8km (03.6miles) from Yablanitsa, and I-2 road, at the city of Shumen. The total length of the road is 264.3km (164.2miles) and it follows the route of E772. I-4 road is planned to be superseded by Hemus motorway (A2).