Capacity tracked worldwide reached 17,479 MW by November 2026.
Why this market is moving now
- A global goal to scale geothermal power and heat twelvefold by 2050 is due to launch at COP31 on 10 November 2026.
- The first greenfield enhanced geothermal project in the world reached commercial operation in Utah on 1 October 2026.
- In September 2026 Google signed a 396 MW enhanced geothermal power deal, the largest of its kind to date.
Key figures
Global figures for this market, with the year each one describes. Use Cite to copy a reference to this page.
| Figure | Value | Year | Cite |
|---|---|---|---|
| Global geothermal power capacity reached 17,173 MW at the end of 2025. | 17,173 MW | 2025 | |
| Geothermal power generation was active in 35 countries worldwide at the end of 2025. | 35 countries | 2025 | |
| Global installed geothermal power capacity increased by 223 MW during 2025. | 223 MW | 2025 | |
| The United States had 3,953 MW of geothermal power capacity at the end of 2025, the most of any country. | 3,953 MW | 2025 | |
| Indonesia had 2,742 MW of geothermal power capacity at the end of 2025, second in the world, and added the most capacity of any country that year. | 2,742 MW | 2025 | |
| Installed geothermal power capacity tracked worldwide stood at 17,479 MW in November 2026. | 17,479 MW | 2026 | |
| Under a 1.5 degree pathway, installed geothermal power capacity would grow from 15.6 GW in 2025 to 193 GW in 2050. | 193 GW | 2050 | |
| A global goal to scale geothermal power and heat twelvefold by 2050 is due to be launched at COP31 in Antalya on 10 November 2026. | 10 November 2026 | 2026 | |
| Fervo Energy's first 33 MW unit at Cape Station, Utah, reached commercial operation on 1 October 2026, the first greenfield enhanced geothermal project in the world to do so. | 33 MW | 2026 | |
| Fervo Energy and Google signed a 396 MW power purchase agreement on 1 September 2026, the largest enhanced geothermal power deal in the world to date. | 396 MW | 2026 |
Calculated figures (shares, changes and prices per kilogram) are plain arithmetic on the reported values. Read how we work.
Companies to watch
Fervo Energy
Developer of enhanced geothermal systems; its first 33 MW unit at Cape Station, Utah, began commercial operation in October 2026.
Buyer under a 396 MW enhanced geothermal power purchase agreement signed in September 2026.
Ormat Technologies
Geothermal plant developer and operator; it recently brought a new geothermal plant in Dominica into commercial operation (
What the full report covers
- 01Executive summary
The answer in one page: size, direction and what moves it - 02Market definition and scope
What is in and out of the global market - 03Global market size, 2021 to 2025
Historical series and growth rates - 04Countries and regions
Demand, supply and trade by country and region - 05Outlook to 2031
Base, low and high scenarios with stated assumptions - 06Rules, policy and deadlines
Regulation and programmes that change demand - 07Drivers and barriers
What accelerates or slows adoption, by customer segment - 08Prices, costs and margins
Unit economics where public data allows - 09Competitive landscape
8 to 12 company profiles with recent moves - 10Opportunities and risks
For new entrants, suppliers and investors - 11Method and assumptions
How every figure was built
Included with the full report
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Frequently asked questions
How big is the global geothermal power market?
Global geothermal power capacity reached 17,173 MW at the end of 2025. Capacity tracked worldwide stood at 17,479 MW in November 2026.
Which countries produce the most geothermal power?
The United States had the most geothermal power capacity at 3,953 MW at the end of 2025. Indonesia was second with 2,742 MW. Geothermal power was produced in 35 countries.
How fast is geothermal power capacity growing?
Global installed geothermal power capacity increased by 223 MW during 2025. Indonesia added the most capacity of any country that year.
What is the long-term outlook for geothermal power?
Under a 1.5 degree pathway, installed geothermal power capacity would grow from 15.6 GW in 2025 to 193 GW in 2050. A global goal to scale geothermal twelvefold by 2050 is due to launch at COP31 on 10 November 2026.
Is enhanced geothermal power commercial yet?
Yes. Fervo Energy's first 33 MW enhanced geothermal unit at Cape Station, Utah, reached commercial operation on 1 October 2026. It was the first greenfield enhanced geothermal project in the world to do so.
Who is buying geothermal power?
Google signed a 396 MW enhanced geothermal power purchase agreement with Fervo Energy on 1 September 2026, the largest such deal to date.
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