Population during each mayor's tenure

Every mayor since 1991, ranked by how population changed from their first day in office, next to Iceland over the same months. Politare shows what happened during a tenure; it does not claim the office-holder caused it.

#	Mayor	City	In office	Total	vs Iceland	Per year	Chart
1	Dagur B. Eggertsson	Reykjavík	16 Jun 2014 – 16 Jan 2024	+15.8% 2014 → 2024	−4.2 pts Iceland +20.0%	+1.5%/yr
2	R Ingibjörg Sólrún Gísladóttir	Reykjavík	13 Jun 1994 – 1 Feb 2003	+10.0% 1993 → 2003	+1.1 pts Iceland +8.9%	+1.1%/yr
3	Jón Gnarr	Reykjavík	15 Jun 2010 – 16 Jun 2014	−0.1% 2010 → 2014	−0.8 pts Iceland +0.7%	0.0%/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); Iceland 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 Iceland, population by municipality from the national register: the final figures of 1 December 1990-1997 (MAN02009, with Kjalarneshreppur, merged into the city in 1998), then 1 January from 1998 (MAN02005, today's municipal borders) · city (the municipality) data · as of Oct 2026.