Population during each governing mayor's tenure
Every governing mayor since 1991, ranked by how population changed from their first day in office, next to Norway over the same months. Politare shows what happened during a tenure; it does not claim the office-holder caused it.
| # | Governing mayor | City | In office | Total | vs Norway | Per year | Chart |
|---|---|---|---|---|---|---|---|
| 1 |  Erling Lae | Oslo | 29 Nov 2000 – 29 Sep 2009 | +13.4% 2000 → 2009 | +6.2 pts Norway +7.2% | +1.4%/yr | |
| 2 | Stian Berger Røsland | Oslo | 29 Sep 2009 – 21 Oct 2015 | +12.5% 2009 → 2015 | +4.9 pts Norway +7.6% | +2.0%/yr | |
| 3 |  Raymond Johansen | Oslo | 21 Oct 2015 – 25 Oct 2023 | +9.5% 2015 → 2023 | +3.2 pts Norway +6.3% | +1.1%/yr | |
| 4 | Rune Gerhardsen | Oslo | 1 Jan 1992 – 15 Jan 1997 from 1992 | +5.9% 1992 → 1997 | +3.1 pts Norway +2.8% | +1.1%/yr | |
| 5 | Eirik Lae Solberg | Oslo | 25 Oct 2023 – now | +2.8% 2023 → 2026 | +0.3 pts Norway +2.5% | +0.9%/yr | |
| 6 | Fritz Huitfeldt | Oslo | 15 Jan 1997 – 29 Nov 2000 | +2.6% 1997 → 2000 | +0.6 pts Norway +2.0% | +0.8%/yr |
Sorted by total, highest first. Every row is indexed to the last count complete before the first day in office ("from" marks a start that had to move because that count had no data, or because the period cut it); Norway is measured over the same months. Levels are per cent changes, rates are differences in %; "per year" compounds levels and divides rates. Tenures with under 12 months, or under three observations, are left out. thousands, 1 January · Statistics Norway, population on 1 January by municipality (table 07459), the residents registered in Oslo, from 1986 · city (the municipality) data · as of Jul 2026.