HS Orka is a privately-owned Icelandic energy company that produces electricity and hot water mainly from geothermal sources, mainly on the Reykjanes Peninsula.

[1] HS Orka operates two geothermal power plants: Svartsengi and Reykjanes, as well as a small hydropower station, Brú.

[2] As of 2022, its total installed electrical capacity is 215 MW, and 190 MWth geothermal hot water power.

In 1976, Svartsengi Power Station began providing geothermal hot water through a district heating network in Grindavík.

In 2019, Alterra sold off its shares in HS Orka and is now majority owned by Macquarie Infrastructure and Real Assets (MIRA).