Trönbyn is a village in Söderhamn Municipality, in Gävleborg County, Sweden. Trönbyn lies at 25 m above sea level. The nearest city is Gävle, 80 km to the south. Among the landmarks around are Trönö gamla kyrka (0.8 km), Faxeholm (14.0 km) and Trönö new Church (2.2 km).