Canton of Nidwalden or Nidwald (German: Kanton Nidwalden [ˈniːdˌvaldn̩] ; Romansh: Chantun Sutsilvania; French: Canton de Nidwald [ni.dwal]; Italian: Canton Nidvaldo) is one of the 26 cantons forming the Swiss Confederation. It is composed of eleven municipalities and the seat of the government and parliament is in Stans. It is traditionally considered a "half-canton", the other half being Obwalden.

Nidwalden lies in Central Switzerland. It borders the canton of Obwalden to the west, the cantons of Lucerne and Schwyz to the north, the Canton of Uri to the east and the Canton of Bern to the south. The canton is essentially in the Alps , south of Lake Lucerne.