Fundin is a lake in the municipalities of Folldal in Innlandet county and Oppdal in Trøndelag county, Norway. The 9.72 km2 lake has a dam at the south end of it, holding back the water for hydroelectric power production, before letting it flow into the Einunna river. The lake lies in the Dovrefjell mountains, about 14 km east of the Drivdalen valley, about 25 km southeast of the village of Oppdal.