The largest geothermal plant in the world is called the Geysers Geothermal Complex, located in the United States, with a capacity of 900 megawatts. It is made up of 22 power plants and spread over several kilometers, located north of San Francisco. It sits on top of a deep magma chamber that spans over 30 square miles.
The United States also has one of the highest installed capacities of geothermal power in the world. The thermal efficiency of geothermal plants is low due to the relatively low temperatures of geothermal fluids; however, its capacity factor tends to be high as it relies on a stable source of energy, unlike wind or solar.
Geothermal energy taps into the thermal energy and radioactive decay leftover from the formation of the Earth. Geothermal plants generates energy by carrying heat to the surface via fluid circulation through various types of mechanics. The plants rely on steam generated from heated water and processed through several methods, including dry steam, flash steam, and binary cycle.
Ranking of largest geothermal plants worldwide as of January 2021
(in megawatts)
Characteristic
Capacity in megawatts
The Geysers (United States)
900
Larderello (Italy)
769
Cerro Prieto (Mexico)
720
Makban (Philippines)
458
Hellisheiði (Iceland)
400
Malitbog (Philippines)
377
Salton Sea (United States)
340
Tiwi (Philippines)
289
Darajat (Indonesia)
259
Wayangu Windu (Indonesia)
227
Created with Highcharts 7.2.2Capacity in megawatts900900769769720720458458400400377377340340289289259259227227The Geysers(United States)Larderello(Italy)Cerro Prieto(Mexico)Makban(Philippines)Hellisheiði(Iceland)Malitbog(Philippines)Salton Sea(United States)Tiwi(Philippines)Darajat(Indonesia)Wayangu Windu(Indonesia)
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Website (climatecare.org). (January 20, 2021). Ranking of largest geothermal plants worldwide as of January 2021 (in megawatts) [Graph]. In Statista. Retrieved May 15, 2025, from https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/
Website (climatecare.org). "Ranking of largest geothermal plants worldwide as of January 2021 (in megawatts)." Chart. January 20, 2021. Statista. Accessed May 15, 2025. https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/
Website (climatecare.org). (2021). Ranking of largest geothermal plants worldwide as of January 2021 (in megawatts). Statista. Statista Inc.. Accessed: May 15, 2025. https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/
Website (climatecare.org). "Ranking of Largest Geothermal Plants Worldwide as of January 2021 (in Megawatts)." Statista, Statista Inc., 20 Jan 2021, https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/
Website (climatecare.org), Ranking of largest geothermal plants worldwide as of January 2021 (in megawatts) Statista, https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/ (last visited May 15, 2025)
Ranking of largest geothermal plants worldwide as of January 2021 (in megawatts) [Graph], Website (climatecare.org), January 20, 2021. [Online]. Available: https://www.statista.com/statistics/525206/geothermal-complexes-worldwide-by-size/
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