Auvergne-Rhône-Alpes is a region in southeast-central France created by the 2014 territorial reform of French regions; it resulted from the merger of Auvergne and Rhône-Alpes. The new region came into effect on 1 January 2016, after the regional elections in December 2015.The region covers an area of 69,711 km2, making it the third largest in metropolitan France; it had a population of 7,994,459 in 2018, second to Île-de-France. It consists of twelve departments and one territorial collectivity with Lyon as the prefecture.
This new region combines diverse geographical, sociological, economic and cultural regions, which was already true of Rhône-Alpes, as well as Auvergne, to a lesser extent. While the old Rhône-Alpes and Auvergne regions each enjoyed a unity defined by axes of communication and the pull of their respective metropoles, the new combination is heterogeneous; it sustained lively opposition from some local officials after its creation.
Wikipedia https://en.wikipedia.org/wiki/Auvergne-Rhône-Alpes
Coordinates 45°45'28.129" N 4°49'55.241" E