The Vidå or, with the definite article, Vidåen (German: Wiedau, North Frisian Widuu) is a creek in the Jutland region of Denmark.
The creek starts east of Tønder and flows around sixty-nine kilometres to the west, ending in the North Sea near Højer.
However, the river gave its name to a Propstei (church or monastery led by a provost) which held North Friesland and whose name is attested in 1240 in the form de Withæ a and 1352 as in ... Withaa.
Albrecht Greule, surveying earlier scholarship, tentatively interpreted the name to mean "pasture" (Weide).
[2] The river-name has also been thought to be found in the ethnonym Wiþmyrgingas, which appears in the Old English poem Widsith.