The Hellisheidi Power Station is the second largest geothermal power plant in the world, and the largest geothermal power plant in Iceland. The facility is located in Hengill, southwest Iceland, 11 km (7 mi) from the Nesjavellir Geothermal Power Station. As of February 2009, the plant produces 213 MW of electricity, with a target capacity of 300 MW of electricity and 400 MW of thermal energy. Once this capacity is reached, it would rank as the largest geothermal power station in the world, in terms of installed capacity.

Electricity production with two 40 MW and 45 MW turbines commenced in 2006. In 2007, an additional steam turbine of 30 MW was added. In 2008, two 40 MW and 45 MW turbines were added with steam from Skarðsmýrarfjall Mountain. The hot water plant will be introduced in 2010.

Country Iceland
Location Hengill
Coordinates 64°02′14″N 21°24′03″W / 64.03722°N 21.40083°W / 64.03722; -21.40083Coordinates: 64°02′14″N 21°24′03″W / 64.03722°N 21.40083°W / 64.03722; -21.40083
Owner Orkuveita Reykjavíkur
Status Operational
Fuel Geothermal
Technology Steam turbine
Turbines 5
Installed capacity 213 MW (February 2009)
Maximum capacity 400 MW
Commissioned 2006