Niedorp (Dutch: [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, along with neighbouring Barsingerhorn, received city rights in 1415, and since 2012 has been a part of the new municipality of Hollands Kroon.

Prehistoric settlements from the Late Neolithic period were found in De Gouw and the Groetpolder.

They are covered by sediment and belong to the Single Grave Culture.

[1][2] The former municipal council of Niedorp consisted of 15 seats, which at the final election in 2010 divided as follows:[3] Elections were held in November 2011 for a council for the new merged municipality of Hollands Kroon that included Niedorp, which commenced work in January 2012.