Laugarvatn (Icelandic pronunciation: [ˈlœyːɣarˌvahtn̥] ) is the name of a lake and a small town in the south of Iceland. The lake is smaller than the neighbouring Apavatn.

Laugarvatn lies within the Golden Circle, a popular tourist route, and acts as a staging post. The town has a population of about 200, and lies predominantly along the west side of the lake. The lake contains geothermal springs under its surface, making it a popular swimming spot with some warm patches along the shoreline year-round.

Menntaskólinn að Laugarvatni (ML), a boarding gymnasium with approximately 200 students, is located in the town. Iceland University of Education's division of Sport and Physical Education was also located here.

• List of lakes of Iceland

• http://www.nat.is/travelguideeng/laugarvatn.htm (Information)
• Laugarvatn