Borgen is a suburb located in the municipality of Asker, Norway. Located some 20 kilometers southwest of Oslo, Borgen has many different styles of residential areas, ranging from apartment complexes and semi-detached houses in the southern area of Borgen, to the villas of Borgen Skog.

There are two elementary schools, Rønningen Barneskole and Hagaløkka Barneskole, and a middle school, Borgen Ungdomsskole.

Mount Vardåsen offers downhill skiing in winter and during the rest of the year nice terrain for Orienteering.

59°49′16″N 10°25′22″E / 59.82111°N 10.42278°E / 59.82111; 10.42278