They inhabit an area known as Frisia and are concentrated in the Dutch provinces of Friesland and Groningen and, in Germany, East Frisia and North Frisia (which was a part of Denmark until 1864).
Habitan nas áreas coñecidas como Frisia e concéntranse nas provincias neerlandesas de Friesland e Groninga e, en Alemaña, na Frisia oriental e setentrional (que foi parte de Dinamarca até 1864).