Population during each prime minister's tenure
Every prime minister since 1991, ranked by how population changed from their first day in office. Politare shows what happened during a tenure; it does not claim the office-holder caused it.
| # | Prime minister | In office | Total | Per year | Chart |
|---|---|---|---|---|---|
| 1 |  Katrín Jakobsdóttir | 30 Nov 2017 – 9 Apr 2024 | +15.4% 2017 → 2024 | +2.1%/yr | |
| 2 |  Davíð Oddsson | 30 Apr 1991 – 15 Sep 2004 | +13.6% 1991 → 2004 | +1.0%/yr | |
| 3 | Geir Haarde | 15 Jun 2006 – 1 Feb 2009 | +6.5% 2006 → 2009 | +2.1%/yr | |
| 4 |  Sigmundur Davíð Gunnlaugsson | 23 May 2013 – 7 Apr 2016 | +3.2% 2013 → 2016 | +1.1%/yr | |
| 5 |  Jóhanna Sigurðardóttir | 1 Feb 2009 – 23 May 2013 | −1.1% 2009 → 2013 | −0.3%/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); 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 Iceland, population on 1 January (MAN00000), from the national register · Iceland data · as of Oct 2026.