Norwegian County Road 5378

Norwegian County Road 5378 (Fylkesvei 5378) is a county road in the municipalities of Ulvik and Ullensvang in Vestland county, Norway.

The road branches off from Norwegian County Road 572 at Vallaviki and continues along the west side of the Eid Fjord before terminating in Djønno. Along the way, it passes through the 603 m Djønno Tunnel. It is also named Tjoflotvegen 'Tjoflot Road' along its course in Ulvik. At the end of the county road in Djønno, a smaller unnamed road continues along the coast to Tjoflot.

The road was re-numbered in 2019 because Hordaland and Sogn og Fjordane counties were scheduled to merge and there were county roads in both counties with the same number. This road previously was County Road 302.