永安河是瑞典的河流，发源自特隆赫姆附近，流经耶姆特兰省和西诺尔兰省，河道全长350公里，流域面积12,851平方公里，平均流量每秒140立方米。

Ljungan (Jamtlandic: Jångna or Aoa, from Old Norse *Oghn "the dreadful") is a 322 kilometer long river in Sweden. It originates near Trondheim and the Norwegian border. The river runs through the Swedish counties of Jämtland and Västernorrland. Several hydropower plants are located along the river.