Lysaker is an area in Bærum Municipality, Akershus County, Norway. Lysaker is the easternmost part of Bærum and borders Oslo proper. Lysaker was initially a farming community, later becoming a residential area. Today it is primarily known as a business and trade area, and a public transport hub. It is considered part of Stor-Oslo, and is home to offices of numerous domestic and international businesses.

Bærum is a municipality in the Greater Oslo Region in Akershus County, Norway. It forms an affluent suburb of Oslo on the west coast of the city. Bærum is Norway's fifth largest municipality with a population of 128,760 (2021). The administrative centre of the municipality is the town of Sandvika. Bærum was established as a municipality on 1 January 1838.