Bogstadvannet is a lake between the city of Oslo and the municipality of Bærum, Akershus, Norway. It is part of Sørkedalsvassdraget, which in turn is part of Oslomarkvassdraget.

Bogstadvannet and surroundings is a popular area for all types of outdoor recreation, and there are ski trails on the west side.

Bogstad Manor, Bogstad Camping and Oslo Golf Club Bogstad are all located along the idyllic lakefront.

The commercial development of Bogstadvannet was largely due to the works of the Bogstad estate. The Leucht family, succeeded by the Anker family, built a significant forestry enterprise in the area, and for many years the lake served as part of the waterway for floating lumber to mills along Lysakerelven.