Dønna is a municipality in Nordland county, Norway. It is part of the Helgeland region. The administrative centre of the island municipality is the village of Solfjellsjøen. Other villages include Bjørn, Dønnes, Hestad, Sandåker, and Vandve. The main island of Dønna is connected to the neighboring municipality of Herøy to the south by the Åkviksundet Bridge.

Helgeland is the most southerly district in Northern Norway. Generally speaking, Helgeland refers to the part of Nordland county that is located south of the Arctic Circle. It is bordered in the north by the Saltfjellet mountains and Svartisen glacier, which form a natural border with the Salten district. In the south, Helgeland borders Trøndelag county.