Landmannalaugar (Icelandic pronunciation: [ˈlan̥tmanːaˌlœiɣar̥] (listen)) is a place in the Fjallabak Nature Reserve in the Highlands of Iceland. It is at the edge of Laugahraun lava field, which was formed in an eruption around the year 1477. It is known for its natural geothermal hot springs and surrounding landscape.

Landmannalaugar is the northern end of the Laugavegur hiking trail. The Iceland Touring Association operates a mountain hut with sleeping bag accommodation for 75 people and a public toilet with showers. During the tourist high season there is also a small shop there that sells coffee and basic groceries, a horse tour agency. ICE-SAR highland patrol in Fjallabak operates from here. Several bus companies have regular trips to and from Landmannalaugar during the tourist season.