Husbysjøen is a village in the municipality of Indre Fosen in Trøndelag county, Norway. It was the administrative centre of the former municipality of Stjørna prior to its merger into neighboring Rissa municipality in 1964. The village is located along the Sørfjorden, an arm of the Stjørnfjorden. It is about 4 kilometres (2.5 mi) south of the village of Råkvåg, about 20 kilometres (12 mi) east of the village of Hasselvika, and about 12 kilometres (7.5 mi) north of the lake Storvatnet. Just north of the village is the Ramsvik Church.