A person is counted if their country of birth is Iran, as recorded in each country’s census or population register.
Most figures come from Eurostat; Germany, the United Kingdom, and Switzerland use their national statistics.
Source: Eurostat population by country of birth. Germany from Destatis Mikrozensus 2025. United Kingdom combined from ONS Census 2021 (England & Wales), NRS Scotland's Census 2022, and NISRA NI Census 2021.
Source: Eurostat population by country of birth. Germany from Destatis Mikrozensus 2025. United Kingdom combined from ONS Census 2021 (England & Wales), NRS Scotland's Census 2022, and NISRA NI Census 2021. Countries with fewer than 10,000 Iran-born residents are shown on the map but omitted from this ranking.
Source: Eurostat for the seven solid lines (Sweden, Netherlands, Austria, Italy, Norway, Denmark, Finland). United Kingdom (dotted) is from ONS/NRS/NISRA census points 2001, 2011, and 2021/22. France (dashed) is from INSEE Recensement de la population — census snapshot 1999, then continuous 2006–2019. The INSEE “immigré” definition is narrower than Eurostat’s foreign-born. Switzerland (dashed) is from the BFS register, 2010–2024. Germany is omitted because Eurostat does not publish Iran-born counts for Germany; see the Germany pages.