The population of Iceland, at the end of the fourth quarter 2021, was 376,000, 192,900 males and 183,110 females, and increased by 1,170 from the previous quarter. There were 77 gender neutrals, but due to the small size of the group they are still counted among men and women based on a random assignment. Inhabitants of the Capital region were 240,750 and 135,260 lived in others regions combined.

A total of 1,150 children were born in the fourth quarter and 610 persons died. Net migration was 610 persons. Net migration of persons with Icelandic citizenship was -90, and 710 for foreign citizens. More males than females emigrated.

Denmark was the most popular destination for Icelandic citizens with 130 persons emigrating in the quarter. Of the 460 Icelandic citizens who emigrated, 260 went to Denmark, Norway or Sweden. The largest group of the 1,360 foreign citizens who emigrated went to Poland (510).

Immigrants of Icelandic citizenship came mostly from Denmark, Norway or Sweden, 230 out of 370, while Poland was the country of origin for most of the foreign immigrants, 470 out of 2,060. Romania came second with 130 immigrants. Foreign citizens were 54,770, or 14.6% of the total population in Iceland at the end of the fourth quarter 2021.

The National Register of Persons is used to calculate the population.