The population of Reykjavík was 138,772 on 1 January 2025, an increase of 1,878 between years. Breiðholt was the most populous district, or 22,178, while Kjalarnes was the smallest, 1,047. The largest increase between years was in Laugardalur, where the population increased by 614. The second largest increase was in Grafarholt-Úlfarsárdalur (322) followed by Árbær (305). In 2025, 1,864 residents of Reykjavík were registered as unspecified legal residents, an increase of 425 between years.

Statistics

Share