| Total population | 387,000–393,000 peopleUN DESA WPP [2024] 393,400 people·World Bank WDI [2024] 386,500 people |
| Median age | 36 yearsUN DESA WPP [2024] |
| Life expectancy | 82.7–82.8 yearsWorld Bank WDI [2024] 82.81 years·UNDP HDI [2023] 82.69 years |
| Ethnic groups | Icelandic 78.7%, Polish 5.8%, Danish 1%, Ukrainian 1%, other 13.5% (2024 est.); note: data represent population by country of birthCIA World Factbook [2025] · 2026 archive |
| Languages | Icelandic, English, Polish, Nordic languages, GermanCIA World Factbook [2025] · 2026 archive |
| Religions | Evangelical Lutheran Church of Iceland (official) 58.6% Roman Catholic 3.8%, Independent Congregation of Reykjavik 2.6%, Independent Congregation of Hafnarfjordur 1.9%, pagan worship 1.5%, Icelandic Ethical Humanist Association 1.4%, other (includes Zuist and Pentecostal) or unspecified 18.7%, none 7.7% (2024 est.)CIA World Factbook [2025] · 2026 archive |
| Urbanization | 94% of total population (2023)CIA World Factbook [2025] · 2026 archive |
| Population growth | 0.218 %World Bank WDI [2024] |
| Birth rate | 11.2 per 1,000World Bank WDI [2024] |
| Death rate | 6.8 per 1,000World Bank WDI [2024] |
| Urban population | 94.2 %World Bank WDI [2024] |
| Languages (structured) | Icelandic / Icelandic Sign Language / Icelandic-Basque PidginGlottolog [2026] |