The 15 boroughs of Oslo were created on 1 January 2004. They each have an elected local council with limited responsibilities.
Local authorities call the current 15 bydeler also "District" in English. [1]
In addition is Marka (1585 residents), that is administered by several boroughs; and Sentrum (861 residents, 1.8 km2) that is partially administered by St. Hanshaugen, and in part directly by the city council. As of 1 January 2008, Oslo had 560,484 residents, of which 1134 were not allocated to a borough.
From 1973 to 30 June 1988, Oslo had 40 boroughs. Some existed only on paper, since they were to be constituted only when the areas were built.
Borough 1: Ruseløkka, Skillebekk, Frogner
Borough 2: Homansbyen, Uranienborg, Majorstua, parts of Fagerborg
Borough 3: St. Hanshaugen, Gamle Aker, parts of Ila and Fagerborg
Borough 4: Marienlyst, Ullevål, Lindern, parts of Fagerborg
Borough 5: Bjølsen, Sagene, parts of Ila
Borough 6: Sandaker, Åsen, Torshov
Borough 7: Grünerløkka, Møllergata
Borough 8: Sinsen, Rodeløkka, parts of Tøyen
Borough 9: Grønland, Gamlebyen, Kampen, Vålerenga, parts of Tøyen
Borough 10: Ekeberg, Holtet, Bekkelaget
Borough 11: Nordstrand
Borough 12–13–14: Holmlia, Hauketo, Rudene
Borough 15: Lambertseter
Borough 16–17: Banderud, Skullerud, Rustad, Bøler, Ulsrud, Tveteråsen
Borough 18: Ryen, Manglerud, Abildsø
Borough 19: Skøyen, Oppsal, parts of Trasop
Borough 20: Etterstad, Helsfyr, Teisen
Borough 21–22: Tveita, Hellerud, Haugerud, Trosterud, parts of Trasop
Borough 23 was to take parts of boroughs 20, 24 and 31
Borough 24–25: Lindeberg, Furuset, Ellingsrud, Haugenstua, Høybråten, Tangerud
Borough 26: Rommen, Fossum, Stovner
Borough 27: Romsås
Borough 28: Rødtvet, Ammerud, parts of Grorud
Borough 29: Kalbakken, Flaen, parts of Grorud
Borough 30: Linderud, Veitvet, Sletteløkka
Borough 31: Løren, Risløkka, Økern
Borough 32: Lofthus, Årvoll, Tonsenhagen
Borough 33: Nydalen, Grefsen, Kjelsås
Borough 34: Tåsen, Korsvoll, Kringsjå
Borough 35: Vinderen, Ris, Slemdal, Holmenkollen
Borough 36: Røa, Hovseter, Voksen
Borough 37: Ullernåsen, Lysaker, Bestum
Borough 38: Huseby, Smestad, Skøyen
Borough 39: Bygdøy
Borough 40: Marka, the islands
From 1985 to 1988, the boroughs of Stovner, Røa, Gamle Oslo and Søndre Nordstrand were trials for the new system. From 1 July 1988 to 31 December 2003, Oslo had 25 boroughs:
Borough 1: Bygdøy–Frogner
Borough 2: Uranienborg–Majorstuen
Borough 3: St.Hanshaugen–Ullevål
Borough 4: Sagene–Torshov
Borough 5: Grünerløkka–Sofienberg
Borough 6: Gamle Oslo
Borough 7: Ekeberg–Bekkelaget
Borough 8: Nordstrand
Borough 9: Søndre Nordstrand
Borough 10: Lambertseter
Borough 11: Bøler
Borough 12: Manglerud
Borough 13: Østensjø
Borough 14: Helsfyr–Sinsen
Borough 15: Hellerud
Borough 16: Furuset
Borough 17: Stovner
Borough 18: Romsås
Borough 19: Grorud
Borough 20: Bjerke
Borough 21: Grefsen–Kjelsås
Borough 22: Sogn
Borough 23: Vinderen
Borough 24: Røa
Borough 25: Ullern
In addition Sentrum and Marka.
