Trofors is the administrative centre of Grane Municipality in Nordland county, Norway. It is located at the confluence of the rivers Austervefsna and Svenningdalselva which together form the large river Vefsna. The village of Leiren lies about 25 km to the southeast and the village of Majavatn lies about 45 km to the south. The 0.79 km2 village has a population (2024) of 860 and a population density of 1089 PD/km2. Trofors lies along the European route E6 highway, at the intersection with Norwegian National Road 73 which heads east to Hattfjelldal and then to onwards to Sweden. The Nordland Line railway runs through the western part of the village, stopping at Trofors Station. The main church for Trofors is Grane Church, located about 5 km to the north in the village of Grane.