Nideggen (German: [ˈniːdɛɡn̩] ⓘ) is a town in the district of Düren in the state of North Rhine-Westphalia, Germany.

The town was created in 1972 by amalgamation of eight until then independent communities: Abenden (782 inhabitants), Berg-Thuir (709), Brück (301), Embken (734), Muldenau (161), Nideggen (2,983), Rath (757), Schmidt (2,974), Wollersheim (637) (December 2014).

Nideggen lies on the river Rur and at the banks of the Rurtalsperre, the second largest dam in Germany.

The region is famous for its precipitous Early Triassic rocks of Buntsandstein in the valley of Rur and is situated between 250 and 450 metres over sea level.

The Düren Gate (Dürener Tor), one of the symbols of the town, hosts regular art exhibitions.