|Max. length||3 km (1.9 mi)|
|Max. width||1.7 km (1.1 mi)|
|Surface area||2 km2 (0.77 sq mi)|
|Water volume||12.1×106 m3 (9,800 acre⋅ft)|
|Sections/sub-basins||Stora Delsjön, Lilla Delsjön|
Delsjön consist of two coherent lakes, Stora Delsjön and Lilla Delsjön, located in eastern Gothenburg, in the Delsjöområdet nature reserve. They serve as a reservoir for the city, receiving water from the Göta River. At the shore of Stora Delsjön there is a popular beach.