Stuttgart is one of 14 Regional centres in Baden-Württemberg and is naturally the primary centre of the Stuttgart Region, making it the administrative centre for a region of containing a total of 2.76 million people as of December 2014. In addition to this, Stuttgart serves as a Mittelzentrum for Esslingen District cities Leinfelden-Echterdingen and Filderstadt, and Ditzingen, and Gerlingen and Korntal-Münchingen in Ludwigsburg District. Stuttgart is also chief of the three centres Stuttgart Metropolitan Region, an area of containing 5.3 million persons.