Geothermal Energy Market,Size, Share, Growth, and Industry Analysis, By type (Hydrothermal Geothermal Energy and Hot Dry Rock Geothermal Energy), By Application (Direct Use and Geothermal Power), and Regional Insights and Forecast From 2026 to 2035

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GEOTHERMAL ENERGY MARKET OVERVIEW

The global Geothermal Energy Market is estimated to be valued at USD 152.01 Billion in 2026. The market is projected to reach USD 285.18 Billion by 2035, expanding at a CAGR of 7.3% from 2026 to 2035.

The global Geothermal Energy Market is expanding as governments and utilities seek reliable renewable power and low-emission heating. Global installed geothermal power capacity reached approximately 15.4 GW in 2024, after about 320 MW of new capacity was commissioned during that year. Geothermal energy provides continuous generation because underground heat is available regardless of sunlight or wind conditions. The geothermal industry is also expanding beyond conventional volcanic resources through enhanced geothermal systems, closed-loop systems, and advanced drilling. In 2025, the global geothermal installed base was reported at approximately 17.35 GW, demonstrating continued additions across Indonesia, the United States, Türkiye, Kenya, Iceland, and other geothermal-producing markets.

The U.S. remains one of the world's most established geothermal markets, supported by extensive resources in California, Nevada, Utah, and other western states. California produced approximately 69% of U.S. utility-scale geothermal electricity in 2025, while the state's operating geothermal plants had combined capacity of nearly 1,900 MW. The Geysers complex alone has approximately 725 MW of generating capacity and remains the world's largest geothermal power complex. Nevada contributed approximately 25% of U.S. utility-scale geothermal generation in 2024, demonstrating the concentration of the American geothermal industry in western states.

Key Findings

LATEST TRENDS

Fossil Fuels to Drive Market Growth

The Geothermal Energy Market is increasingly moving toward enhanced geothermal systems, closed-loop geothermal technology, superhot-rock drilling, binary-cycle generation, and integration with electricity-intensive industries. Conventional geothermal development historically depended heavily on naturally occurring hot water and steam reservoirs, but advanced geothermal systems are designed to access heat in locations where conventional resources are unavailable. In 2025, Eavor commissioned its Geretsried project in Germany, marking the first commercial closed-loop geothermal project of its kind. The facility has approximately 8.2 MW of electrical capacity and approximately 64 MW of thermal output, demonstrating the growing importance of combined heat-and-power geothermal applications.

Artificial intelligence and data-center electricity demand are creating another important geothermal market trend. In 2025, Meta signed an agreement with XGS Energy to develop 150 MW of advanced geothermal power in New Mexico, specifically supporting increasing electricity requirements associated with AI infrastructure. Advanced geothermal systems can provide firm electricity without depending on daily solar or wind availability. The U.S. also had approximately 58 active geothermal developing prospects and projects across 9 states, according to market assessments, indicating that geothermal exploration is expanding beyond existing producing fields.

Technology developers are also applying oil-and-gas drilling expertise to geothermal projects. Horizontal drilling, high-temperature materials, directional drilling, reservoir stimulation, and advanced well monitoring are becoming important technologies for the Geothermal Energy Market. Eavor reported a 50% reduction in drilling time per lateral at Geretsried and a 3-fold increase in drill-bit run length during its 2025 development work. Ormat finalized the design of its 100 MW Ormega100 enhanced geothermal plant in 2026, with pilot programs expected to validate the technology before commercial deployment. These developments demonstrate a shift toward larger, more scalable geothermal systems.

• According to the U.S. Department of Energy, 29% of new geothermal projects in 2024 were integrated with solar or wind energy systems, improving energy reliability and reducing fossil fuel dependence.

• The European Geothermal Energy Council (EGEC) reported that over 120 urban heating networks in Europe and Asia-Pacific now utilize geothermal heat, reflecting rapid adoption in growing cities.

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GEOTHERMAL ENERGY MARKET SEGMENTATION

The Geothermal Energy Market can be segmented by resource type and application, with hydrothermal geothermal energy representing established commercial deployment and hot dry rock technology representing the emerging enhanced geothermal segment. Market assessments indicate that hot dry rock geothermal energy accounts for more than 90% of the categorized market in some market models, reflecting the broad potential attributed to advanced geothermal resources. By application, direct use is estimated at approximately 87% in the specified market segmentation, while geothermal power represents the electricity-generation component. Direct-use applications include district heating, greenhouse heating, industrial processes, bathing, agriculture, and building heating, while geothermal power uses steam or hot fluids to produce electricity.

By Type

Based on Type, the global market can be categorized into Hydrothermal Geothermal Energy and Hot Dry Rock Geothermal Energy.

• Hydrothermal Geothermal Energy: Hydrothermal Geothermal Energy uses naturally occurring underground reservoirs containing hot water or steam and remains the foundation of commercial geothermal power development. Conventional hydrothermal systems include dry-steam, flash-steam, and binary-cycle plants, with the appropriate technology determined by reservoir temperature and fluid characteristics. Global geothermal power capacity reached approximately 15.4 GW in 2024, demonstrating the established scale of hydrothermal development. Hydrothermal systems continue to dominate existing geothermal electricity production because they use proven reservoir and power-conversion technologies. Hydrothermal geothermal energy also supports direct-use applications where reservoir temperatures are suitable for heating rather than electricity generation. 

  Hot Dry Rock Geothermal Energy: Hot Dry Rock Geothermal Energy represents an advanced geothermal approach that extracts heat from hot rock formations where naturally available fluid circulation may be insufficient. Market research models attribute more than 90% of the categorized geothermal energy market to hot dry rock in some forecasts, although the figure reflects the market definition used rather than the share of currently operating conventional plants. Enhanced geothermal systems are important because they can potentially unlock geothermal resources in areas that lack naturally productive hydrothermal reservoirs. Fervo Energy, Eavor, XGS Energy, and other technology developers are demonstrating different approaches to accessing deep geothermal heat using advanced drilling, reservoir stimulation, or closed-loop circulation.

By Application

Based on application, the global market can be categorized into Direct Use and Geothermal Power.

• Direct Use: Direct Use represented approximately 87% of the geothermal energy market in one widely cited market segmentation model, reflecting the large amount of geothermal heat used directly rather than converted into electricity. Direct-use applications include district heating, greenhouse cultivation, industrial process heat, aquaculture, bathing, food processing, and building heating. China has developed approximately 38 TWh of annual geothermal direct-use heating according to market assessments, while Iceland uses geothermal heat for approximately 90% of building heating. Direct use can avoid electricity-generation losses because geothermal heat is transferred directly to buildings or industrial processes. This makes direct-use geothermal energy particularly valuable in locations where reservoir temperatures are suitable for thermal applications but insufficient for economical electricity generation.

• Geothermal Power: Geothermal Power represents the electricity-generation application of the Geothermal Energy Market and is supported by the technology's ability to provide continuous renewable electricity. Global installed geothermal power capacity reached approximately 15.4 GW in 2024, with approximately 320 MW of new capacity commissioned during that year. Geothermal power plants can use dry steam, flash steam, or binary-cycle technologies depending on reservoir conditions. In California, operating geothermal facilities had combined capacity of nearly 1,900 MW in 2025, while The Geysers complex had approximately 725 MW of installed capacity. These figures demonstrate the importance of utility-scale geothermal power in established markets.Geothermal power is also gaining attention as a firm electricity source for data centers and other high-load customers. 

MARKET DYNAMICS

Market dynamics include driving and restraining factors, opportunities and challenges stating the market conditions.

Driving Factor

Rising demand for reliable low-emission electricity and renewable baseload generation

The growing requirement for reliable electricity is a major driver of the Geothermal Energy Market because geothermal plants can operate continuously and complement variable solar and wind generation. Global installed geothermal power capacity reached approximately 15.4 GW in 2024, while the technology's global weighted-average levelized cost for projects commissioned that year was approximately USD 0.060 per kWh. Geothermal plants can also operate with high availability because their energy source is not dependent on daily weather conditions.

Countries such as Kenya obtain approximately 47% of their electricity from geothermal resources, demonstrating how geothermal energy can become a major component of a national electricity system. The combination of continuous generation, low operational emissions, and domestic energy resources is strengthening demand for geothermal power in markets pursuing energy security and grid stability.

• According to IRENA, 44% of geothermal energy installations in 2024 were motivated by national climate policies aimed at reducing greenhouse gas emissions and meeting renewable energy targets.

• The U.S. Geological Survey (USGS) states that over 150 binary cycle geothermal plants are operational globally, enabling electricity generation from lower-temperature resources and expanding potential project locations.

Restraining Factor

High drilling costs, geological uncertainty, and lengthy project development

High exploration and drilling requirements remain significant restraints for the Geothermal Energy Market because developers must confirm underground temperature, permeability, fluid availability, and reservoir characteristics before large-scale investment. Drilling can account for approximately 40% of total geothermal project costs, making well construction one of the most important determinants of project feasibility. Geothermal development can require deep wells, specialized equipment, seismic surveys, reservoir modeling, and extensive environmental assessment.

Advanced geothermal systems add technical complexity because developers must create or access artificial heat-exchange pathways at significant depths. Research on enhanced geothermal systems identifies drilling cost as a major factor influencing commercial competitiveness, while improvements in drilling efficiency can substantially reduce project expenditure. The technical uncertainty associated with exploration can therefore delay investment decisions and increase financing risk compared with renewable technologies requiring less subsurface exploration.

• According to the World Bank Energy Sector Report, 32% of geothermal projects report that high costs of drilling equipment and construction materials limit expansion, particularly for small-scale operations.

• The International Geothermal Association (IGA) notes that 28% of geothermal reservoirs experience decreased heat output or ground subsidence without proper fluid reinjection and management, constraining long-term viability.

Expansion of enhanced geothermal systems, closed-loop systems, and geothermal heat applications

Opportunity

Enhanced geothermal systems represent a major opportunity because they can potentially expand geothermal development beyond naturally permeable hydrothermal reservoirs. Advanced geothermal technologies could significantly expand the technically accessible geothermal resource base, with enhanced geothermal systems potentially accessing heat resources that conventional hydrothermal projects cannot economically reach. In 2025, Meta agreed to support 150 MW of advanced geothermal development in New Mexico, while Eavor began commercial electricity production from its closed-loop Geretsried project in Germany.

Eavor's Geretsried facility combines approximately 8.2 MW of electrical output with approximately 64 MW of thermal output, meaning thermal capacity represents approximately 88.7% of the project's combined 72.2 MW output. Advanced geothermal technologies can therefore expand the addressable market while creating opportunities for drilling companies, equipment manufacturers, utilities, data centers, and industrial heat users.

• According to the U.S. Department of Energy, 21% of geothermal plants are now planned or under construction as hybrid facilities with solar or wind integration, improving grid stability and energy efficiency.

• IRENA reports that over 15 new geothermal projects were approved in India and Indonesia in 2024, driven by rising electricity demand and government incentives for renewable energy adoption.

Reservoir management, induced seismicity, environmental requirements, and technology reliability

Challenge

Geothermal projects face technical and environmental challenges involving reservoir pressure, water management, induced seismicity, corrosion, mineral scaling, drilling temperatures, and long-term heat extraction. Drilling and well construction can represent approximately 40% of geothermal project costs, increasing the financial impact of technical problems during development. These issues become more important as developers move toward enhanced geothermal systems and deeper reservoirs. The Geretsried project required wells exceeding 8 kilometers in measured depth during its development process, demonstrating the engineering complexity involved in next-generation geothermal projects. In conventional operations, reservoir replenishment is also important; The Geysers uses approximately 13 million gallons of recycled municipal water each day for reservoir injection. Effective monitoring, well design, reservoir management, and environmental controls are therefore essential for maintaining reliable geothermal output and protecting surrounding communities. Water-management requirements can become particularly significant because geothermal reservoirs depend on maintaining adequate fluid circulation throughout the operating life of a project.

• High Initial Capital Investment: According to the International Energy Agency (IEA), more than 30% of planned geothermal projects are delayed due to high upfront costs, including drilling and infrastructure development.

• Skilled Workforce Shortage: The U.S. Department of Energy reports that nearly 25% of geothermal projects face delays because of insufficient trained engineers and technicians for drilling, plant operation, and maintenance.

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GEOTHERMAL ENERGY MARKET REGIONAL INSIGHTS

Regional performance is concentrated in areas with strong geological resources, established drilling expertise, supportive energy policies, and suitable electricity or heating markets. Asia-Pacific accounted for approximately 37.46% of the global geothermal energy market in 2025 in one market assessment, while North America represented approximately 23.88% and Europe approximately 22.76%. Another installed-capacity assessment placed Asia-Pacific at approximately 44.27% in 2025, reflecting differences between market-value and installed-capacity methodologies. The United States, Indonesia, the Philippines, Türkiye, Kenya, Iceland, and New Zealand remain among the most important geothermal countries.

• North America

North America represented approximately 23.88% of the global Geothermal Energy Market in 2025 according to one market-value assessment. The United States dominates regional geothermal development because of its extensive resource base, established power plants, drilling infrastructure, and growing interest in advanced geothermal systems. California produced approximately 69% of U.S. utility-scale geothermal electricity in 2025, while Nevada represented approximately 25% of national utility-scale geothermal electricity generation in 2024. California's operating geothermal plants had nearly 1,900 MW of combined capacity, demonstrating the substantial scale of the regional industry. The U.S. market is also becoming a major center for next-generation geothermal technology. Approximately 58 active developing prospects and projects were identified across 9 states, with Nevada hosting many of the projects. I

• Europe

Europe represented approximately 22.76% of the global Geothermal Energy Market in 2025 in one market assessment, making it a major regional market for geothermal heating, power generation, and advanced geothermal technology. Approximately 10 European countries currently have operating geothermal power plants, while more than 20 countries have geothermal projects in development. Germany, Italy, Iceland, Türkiye, France, and the Nordic countries are particularly important markets. Europe has also developed strong district-heating applications, making geothermal energy relevant to both electricity and thermal markets. The region's focus on energy security and low-carbon heating is strengthening interest in deep geothermal resources. Germany became an important center for advanced geothermal development in 2025 when Eavor's Geretsried facility began supplying electricity to the grid. 

• Asia-Pacific

Asia-Pacific held approximately 37.46% of the global Geothermal Energy Market in 2025 under one market-value assessment, while another installed-capacity assessment placed its share at approximately 44.27%. The region's leadership is supported by Indonesia, the Philippines, Japan, China, and New Zealand. Indonesia is particularly important because it possesses an estimated 29,500 MW of geothermal potential and had approximately 2.8 GW of installed geothermal capacity in 2025. The country has targeted approximately 5 GW of geothermal capacity by 2030, creating substantial opportunities for drilling, plant construction, reservoir management, and power-grid integration. Indonesia's position strengthened further in 2025 and 2026 through new project development. Pertamina Geothermal Energy commissioned the 55 MW Lumut Balai Unit 2 project in 2025, increasing its managed installed capacity to 727 MW across 6 operational areas. 

• Middle East & Africa

Middle East & Africa accounted for approximately 8% of the global Geothermal Energy Market in one regional market assessment, while South America represented approximately 4%, demonstrating that geothermal development remains geographically concentrated but increasingly diversified. Kenya is the region's strongest geothermal market and has become one of the world's leading geothermal electricity producers. Kenya's geothermal capacity has reached approximately 985 MW, while geothermal contributes approximately 47% of the country's electricity. The Olkaria geothermal complex remains the central development hub, with approximately 799 MW operated by KenGen and additional capacity supplied by independent producers. Africa's geothermal opportunity is supported by the Great Rift Valley, which extends across several countries with significant underground heat resources. Kenya's experience demonstrates how geothermal power can reduce dependence on fossil fuels while providing reliable electricity. 

KEY INDUSTRY PLAYERS

The Geothermal Energy Market includes vertically integrated developers, state-owned utilities, independent power producers, technology companies, and geothermal specialists operating across multiple countries. The competitive environment includes established operators such as Energy Development Corporation, Pertamina Geothermal Energy, Ormat, Calpine, Enel Green Power, KenGen, and Star Energy. The top 5 companies in one 2025 market assessment collectively represented approximately 34% of the global market, indicating meaningful concentration among large geothermal operators while leaving substantial participation for regional companies and technology developers. Competitive strength is influenced by geothermal resource ownership, drilling expertise, project financing, plant technology, reservoir management, and long-term power purchase agreements.

Pertamina Geothermal Energy is one of the largest geothermal operators and reported approximately 727 MW of installed capacity across 6 operational areas after the Lumut Balai Unit 2 addition in 2025. Ormat operates geothermal and renewable assets across multiple countries and reported approximately 1,230 MW in its combined geothermal and solar generation portfolio in 2025. Calpine operates 13 geothermal plants at The Geysers, while Enel Green Power had approximately 0.86 GW of geothermal capacity within its global generation portfolio at the end of 2025. These operating footprints demonstrate the importance of scale and diversified geographic exposure.

List of Top Geothermal Energy Companies

• Energy Development
• Comisión Federal de Electricidad
• Ormat
• Enel Green Power
• Calpine
• KenGen
• Pertamina Geothermal Energy
• Contact Energy
• Orkuveita Reykjavikur
• Star Energy Ltd
• Berkshire Hathaway Energy
• Northern California Power Agency
• HS Orka
• Cyrq Energy

List of Top Two Companies with Highest Market Share

• Pertamina Geothermal Energy - more than 10% market share: Pertamina Geothermal Energy was identified as the leading company in a 2025 global Geothermal Energy Market assessment, with a market share exceeding 10%. The company had approximately 727 MW of installed capacity across 6 operational areas in 2025 and continued expanding its project pipeline in Indonesia. Its 2026 cooperation agreement with PLN covered 19 geothermal projects totaling 530 MW, reinforcing its position as one of the industry's largest development platforms.

• Ormat Technologies - second-leading position among the top five: Ormat was identified as one of the 5 leading geothermal companies collectively holding approximately 34% of the global market in 2025. Its combined geothermal and solar generation portfolio reached approximately 1,230 MW, with operations across the United States, Kenya, Guatemala, Indonesia, Honduras, and Guadeloupe. Ormat also finalized its 100 MW Ormega100 enhanced geothermal design in 2026, strengthening its position in next-generation geothermal technology.

Investment Analysis and Opportunities

Investment activity in the Geothermal Energy Market is increasingly focused on enhanced geothermal systems, closed-loop technology, drilling innovation, geothermal heating, and firm electricity supply for high-demand customers. In 2025, 4 Pertamina Geothermal Energy projects were included in Indonesia's national development financing framework, with planned additions totaling 215 MW. These projects represented approximately 7.2% of Indonesia's 3 GW national geothermal development target. The projects include Lumut Balai Unit 3, Lumut Balai Unit 4, Gunung Tiga/Ulubelu Extension I, and Lahendong Units 7–8 & Binary.

Government-backed financing can therefore support approximately 7% of targeted new geothermal capacity through selected projects while reducing exploration and project-development barriers. Investment opportunities are also increasing in drilling services, geothermal turbines, reservoir engineering, and power-grid integration as developers seek to expand geothermal capacity. Data centers are emerging as another important investment opportunity because AI workloads require large quantities of reliable electricity. Meta's 150 MW New Mexico agreement with XGS Energy in 2025 represents approximately 0.5% of Indonesia's 30 GW equivalent geothermal potential when used as a capacity comparison, while demonstrating the scale of electricity demand emerging from AI infrastructure. 

New Product Development

New product development in the Geothermal Energy Market is focused on advanced drilling systems, binary-cycle equipment, enhanced geothermal systems, closed-loop circulation, high-temperature materials, and modular power plants. Eavor's Geretsried development demonstrated several technology innovations in 2025, including Insulated Drill Pipe, Active Magnetic Ranging, and Rock-Pipe completion technology. The company reported a 50% reduction in drilling time per lateral and a 3-fold increase in bit run length. These developments are important because drilling represents one of the most technically challenging components of geothermal project development, particularly when wells extend several kilometers beneath the surface.

Ormat finalized the design of the 100 MW Ormega100 enhanced geothermal power plant in 2026, targeting a plant size approximately twice that of its previous largest model. Eavor's Geretsried system uses a closed underground heat exchanger and does not require thermal water circulation, with approximately 8.2 MW of electrical capacity and 64 MW of thermal output. Pertamina Geothermal Energy also expanded conventional plant development through the 55 MW Lumut Balai Unit 3 project launched in 2026. These developments demonstrate that geothermal product innovation is occurring across conventional hydrothermal systems, binary technology, closed-loop systems, and enhanced geothermal platforms.

Five Recent Developments (2025-2026)

• Eavor - 2025: Eavor began supplying electricity from the Geretsried geothermal project to Germany's public grid in December 2025, marking the first commercial deployment of its closed-loop multilateral geothermal technology. The project provides approximately 8.2 MW of electrical power and approximately 64 MW of thermal output.
• Pertamina Geothermal Energy - 2025: PGE commissioned the 55 MW Lumut Balai Unit 2 geothermal plant in June 2025. The project increased PGE's installed capacity to approximately 727 MW across 6 operational areas and strengthened Indonesia's geothermal electricity supply.
• Pertamina Geothermal Energy - 2026: PGE officially began construction of the 55 MW Lumut Balai Unit 3 project in January 2026, with commercial operation targeted for 2030. The development forms part of a broader Indonesian geothermal expansion program involving 19 projects totaling 530 MW under a cooperation framework with PLN Indonesia Power.
• Meta and XGS Energy - 2025: Meta signed an agreement with XGS Energy in June 2025 to develop 150 MW of advanced geothermal power in New Mexico. The project is designed to support increasing electricity requirements associated with AI infrastructure and demonstrates the emergence of large technology companies as geothermal power customers.
• Ormat -2026: Ormat finalized the design of the 100 MW Ormega100 enhanced geothermal power plant in June 2026. The design uses enhanced geothermal technology intended to expand geothermal deployment beyond naturally productive hydrothermal reservoirs, while 2 pilot programs are being used to validate the technology before commercial construction.

Report Coverage of Geothermal Energy Market

The Geothermal Energy Market report covers geothermal electricity generation, direct-use applications, resource types, regional markets, competitive positioning, technology development, investment activity, and recent industry developments. The report evaluates hydrothermal geothermal energy and hot dry rock geothermal energy while examining applications such as direct heating and geothermal power. Global geothermal power capacity reached approximately 15.4 GW in 2024, while approximately 320 MW of new capacity was commissioned during that year.

The report therefore considers both established geothermal assets and emerging enhanced geothermal systems that are expanding the geographical potential of geothermal development. Regional coverage includes North America, Europe, Asia-Pacific, and Middle East & Africa, with Asia-Pacific holding approximately 37.46%, North America approximately 23.88%, and Europe approximately 22.76% of the global market in one 2025 market assessment.

Competitive analysis includes Energy Development, Comisión Federal de Electricidad, Ormat, Enel Green Power, Calpine, KenGen, Pertamina Geothermal Energy, Contact Energy, Orkuveita Reykjavikur, Star Energy, Berkshire Hathaway Energy, Northern California Power Agency, HS Orka, and Cyrq Energy. The report also covers advanced geothermal developments from 2025 and 2026, including closed-loop geothermal systems, enhanced geothermal systems, advanced drilling, geothermal data-center power agreements, and new Indonesian geothermal capacity.