Lommedalen is a rural community in a small valley in Bærum municipality in the county of Akershus, Norway. The population is about 3,000 people. Lommedalen valley opens up at Bærums Verk and runs about 5 kilometers to the north. Lommedalen includes wooded areas, some agricultural land, and residential zones. It includes parts of the forest area Krokskogen. The river Lomma runs through the valley. A forest road from Lommedalen goes to Hole in Buskerud.