Mézin is a commune of the Lot-et-Garonne département, in southwestern France. The commune is the lowest level of administrative division in the French Republic. Lot-et-Garonne ( Occitan: Òlt e Garona) is a department in the southwest of France named after the Lot and Garonne rivers In the context of the political and geographic organization of France and many of its former colonies a department (département depaʁtǝmɑ̃ is an Administrative division This article is about the country For a topic outline on this subject see List of basic France topics.