Østensjø is a borough of the city of Oslo

Oslo

Oslo is a municipality, as well as the capital and most populous city in Norway. As a municipality , it was established on 1 January 1838. Founded around 1048 by King Harald III of Norway, the city was largely destroyed by fire in 1624. The city was moved under the reign of Denmark–Norway's King...

, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

.

The borough is in the southeastern part of Oslo. It is well known for its proximity to the forested area of Østmarka

Østmarka

Østmarka is a forested area to the east of Oslo and part of the congregation of woodland areas known as Oslomarka. The area is situated within the municipalities Oslo, Lørenskog, Rælingen, Ski and Enebakk...

, a popular resort and hiking area for the citizens of Oslo and Lørenskog. Østensjø consists of the suburbs of Bøler

Bøler

Bøler is a south-eastern suburb of Oslo, Norway. It is one of the more picturesque areas of Oslo. Østmarka forest and lake Nøklevann in its immediately vicinity. Infrastructure-wise, it has a shopping center , two elementary schools, a public bath, a library, a church and a stop on the...

, Oppsal

Oppsal

Oppsal is a suburb in the borough of Østensjø in Oslo, Norway.The modern history of Oppsal starts with villas and summer homes built during the Interwar period. The Oslo Tramway was extended to Oppsal in 1926....

 and Manglerud

Manglerud

Manglerud was a borough of the city of Oslo, Norway up to January 1, 2004, when it became part of the borough of Østensjø. Manglerud was built in the 1960s as a suburb to Oslo, connected by the Oslo T-bane metro system.-Floorball:...

, all located around Lake Østensjøvannet

Østensjøvannet

Østensjøvannet is a lake in Oslo, capital of Norway. It is well-known for the wide variety of birds and other wildlife that can be found there. It is surrounded by the Østensjø borough...

. The Østensjøvannet area has been a protected wildlife reserve since 1992.

The club IL Manglerud Star

IL Manglerud Star

Idrettslaget Manglerud Star is a Norwegian alliance sports club from Manglerud, Oslo. It has sections for association football and ice hockey.-General history:...

 which is known for ice hockey

Manglerud Star Ishockey

Manglerud Star Ishockey is a Norwegian ice hockey team from Manglerud.The club has delivered more players to professional hockey leagues around the world than any other hockey team in Norway...

 and football

Manglerud Star Toppfotball

Manglerud Star Toppfotball is a football club based in Oslo, Norway. The club was established in its current form on December 14, 2005 after a merger between Manglerud Star Fotball, and Fotballklubben Oslo Øst, originally formed in 2000....

is located here.