The 15 boroughs of Oslo were created on 1 January 2004. They each have an elected local council with limited responsibilities.

Borough Residents Area Number Alna 49 801 13,7 km2 12 Bjerke 33 422 7,7 km2 9 Frogner 59 269 8,3 km2 5 Gamle Oslo 58 671 7,5 km2 1 Grorud 27 707 8,2 km2 10 Grünerløkka 62 423 4,8 km2 2 Nordre Aker 52 327 13,6 km2 8 Nordstrand 52 459 16,9 km2 14 Sagene 45 089 3,1 km2 3 St. Hanshaugen 38 945 3,6 km2 4 Stovner 33 316 8,2 km2 11 Søndre Nordstrand 39 066 18,4 km2 15 Ullern 34 596 9,4 km2 6 Vestre Aker 50 157 16,6 km2 7 Østensjø 50 806 12,2 km2 13

In addition is Marka (1610 residents), that is administered by several boroughs; and Sentrum (1471 residents, 1.8 km2) that is partially administered by St. Hanshaugen, and in part directly by the city council. As of 1 January 2020, Oslo had 693,494 residents, of which 2386 were not allocated to a borough.

Former borough structure

Borough structure 1973–88

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

Borough structure 1988–2004

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.

References