Paris Nanterre University, formerly Paris-X and commonly referred to as Nanterre, is a public research university based in Nanterre, Paris, France. It is one of the most prestigious French universities, mainly in the areas of law, humanities, political science, social and natural sciences and economics. It is one of the thirteen successor universities of the University of Paris. The university is located in the western suburb of Nanterre, in La Défense area, the business district of Paris.

Nanterre is the prefecture of the Hauts-de-Seine department in the western suburbs of Paris, France. It is located some 11 km (6.8 mi) northwest of the centre of Paris. In 2018, the commune had a population of 96,807.