Niedorp (ˈnidɔr(ə)p; West Frisian: Nierup) is a former municipality in the north-western Netherlands, in the province of North Holland and the region of West-Frisia. Niedorp, as well as Barsingerhorn, located in the former municipality of Niedorp, received city rights in 1415. Since 2012 Niedorp is a part of the new municipality of Hollands Kroon.
The former municipality of Niedorp consisted of the following cities, towns, villages and/or districts: Barsingerhorn, Haringhuizen, Kolhorn, Lutjewinkel, Nieuwe Niedorp, Oude Niedorp, 't Veld, Winkel, Zijdewind.
Prehistoric settlements from the Late Neolithic were found in De Gouw and the Groetpolder. They are covered by sediment and belong to the Single Grave Culture. In 1995, these sites were submitted to UNESCO's list of World Heritage Sites. They are currently on the tentative list.
The former municipal council of Niedorp consisted of 15 seats, which were d