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