Obernai (French: Obernai; Alsatian: Owernah; German: Oberehnheim) commune in the Bas-Rhin department in Alsace in north-eastern France. It lies on the eastern slopes of the Vosges mountains.Obernai is a rapidly growing city, its number of inhabitants having gone up from 6,304 in 1968 to 11,099 in 2006. The metropolitan area of Obernai had 12,369 inhabitants in 2006, from 7,293 in 1968.