Leonding [ˈleːɔ̯nd̥iŋ] is a city southwest of Linz in the Austrian state of Upper Austria. It borders Puchenau and the river Danube in the north, Wilhering and Pasching in the west, Traun in the south and Linz in the east. With a population of more than 27 thousand people, Leonding is the most populous city of the Linz-Land district and the fourth most populous city in Upper Austria.