Fundin is a lake in Folldal Municipality in Innlandet county and Oppdal Municipality in Trøndelag county, Norway. The 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 east of the Drivdalen valley, about southeast of the village of Oppdal.