The Netherlands uses population registers rather than a traditional census. A person is classified as Iranian-origin if they meet at least one of:
Third-generation residents (Dutch-born with Dutch-born parents) are not counted as Iranian-origin in CBS statistics. The classification is derived from birth records, not self-reported ethnicity or language.
Source: CBS StatLine — Statistics Netherlands, Population Register, January 2026
Source: Eurostat — Iran-born population stock, 1999–2025; 1990 and 1995 from UN DESA
Source: CBS StatLine — Statistics Netherlands, residence duration, January 2025
Source: CBS StatLine — Statistics Netherlands, Population Register 2025