Solfjellsjøen is a village and the administrative centre of Dønna Municipality, located in the Nordland county of Norway. It is situated on the west-central part of the island of Dønna.
The area features local landmarks such as Nordvik Church, which is positioned approximately 2 kilometres north of the village. Additionally, Solfjellsjøen serves as a point of transit with a ferry connection to the nearby island of Vandve located to the west.