Hautes-Alpes is a department in the Provence-Alpes-Côte d'Azur region of Southeastern France. It is located in the heart of the French Alps, after which it is named. Hautes-Alpes had a population of 141,220 as of 2019, which makes it the third least populated French department. Its prefecture is Gap; its sole subprefecture is Briançon. Its INSEE and postal code is 05.