Donsö (Swedish pronunciation: [ˈdûːnsøː]) is a small island in the Southern Gothenburg Archipelago and a locality situated in Gothenburg Municipality, Västra Götaland County, Sweden. It had 1,407 inhabitants in 2010. The local covenant church on Donsö has approximately 500 members.

The following sports clubs are located in Donsö:

Donsö has a long history of shipping, especially in tanker businesses. The following companies are located or owned by people living on Donsö.