Geothermal Leaders: How Top Producing Countries Are Quietly Reshaping Energy Markets

Countries with the largest geothermal power industries are quietly reshaping the global energy mix, using heat from the earth’s crust to reduce fossil fuel reliance, stabilise power grids, and hedge against fuel‑price shocks. For investors, the geography of geothermal capacity points to specific markets where regulation, geology, and capital are already aligned—and where future project pipelines are most tangible.

Where geothermal power is concentrated

Geothermal power is not evenly distributed. It depends on tectonic and volcanic activity, drilling expertise, and policy support. In practice, a small group of countries accounts for most installed capacity and electricity output.

• United States
  The United States remains the single largest producer of geothermal electricity. Major fields in California (notably the Geysers complex), Nevada, Utah and other western states contribute steady baseload power to regional grids. Capacity remains modest versus overall U.S. generation, but the existing project base, robust subsurface expertise from the oil and gas sector, and federal incentives for low‑carbon technologies underpin a deep development pipeline. For investors, activity is clustered in regulated utilities, specialist developers, and oilfield‑service companies diversifying into geothermal drilling and subsurface services.

• Indonesia
  Indonesia sits on the Pacific “Ring of Fire” and has some of the world’s richest geothermal resources. It is already one of the top electricity producers from geothermal and has long-stated ambitions to climb to the very top of the global rankings. The resource base is strong, but project development has historically been slowed by complex permitting, tariff structures, and exploration risk. Recent policy efforts have focused on de‑risking early‑stage drilling and improving power‑purchase frameworks. Geothermal growth here is directly linked to long‑term electricity demand, coal‑to‑clean transition plans, and the ability of foreign and domestic capital to navigate regulatory and sovereign‑risk considerations.

• Philippines
  The Philippines has one of the highest shares of geothermal in its power mix, with long‑established fields feeding directly into the national grid. That legacy portfolio reflects decades of investment and favourable geology in volcanic regions. While growth has been slower in recent years compared with some peers, the installed base provides predictable cash flows in a market still working to improve grid resilience and diversify away from imported fuels. Investors tend to access this exposure via listed utilities and independent power producers with mixed portfolios that combine geothermal, hydro, and increasingly solar and wind.

• Turkey
  Turkey has rapidly climbed into the top tier of geothermal producers over the past decade, driven by policy incentives, feed‑in tariffs, and a strong domestic drilling and construction ecosystem. Much of the capacity is concentrated in western Anatolia, where high‑temperature resources support power plants and direct‑use applications. The policy environment has evolved as the market has matured, with tariff adjustments and local‑content rules shaping project economics. For investors, key questions include currency risk, regulatory stability, and the balance between domestic developers and foreign capital in financing new builds.

• New Zealand
  New Zealand’s geothermal resources, largely in the North Island, play a central role in its already high share of renewables. Geothermal plants there provide low‑carbon baseload that complements hydro, reducing reliance on fossil backup. The market is relatively small in absolute terms but notable for its integration of geothermal into a broader decarbonisation strategy, stable regulatory framework, and presence of listed utilities that operate mixed renewable portfolios. That combination often makes geothermal exposure here more of a regulated‑utility play than a pure project‑finance story.

• Kenya and East Africa
  Kenya has emerged as Africa’s leading geothermal producer, centred on the Olkaria field in the Great Rift Valley. Geothermal now accounts for a significant share of Kenya’s power generation, helping reduce exposure to hydrological risk and imported fuels. Expansion plans, underpinned by multilateral financing and public‑private partnerships, aim to add more capacity over time, with Ethiopia and other Rift Valley states also exploring their resources. The main investor considerations include sovereign and currency risk, grid and transmission constraints, and the role of development finance institutions in structuring projects.

Why this matters for investors

For an investor audience, geothermal stands out among renewables for its baseload characteristics—it provides continuous output, unlike wind and solar, which depend on weather and daylight. That makes it particularly relevant to the following:

• Utilities seeking to balance variable renewables and retire coal or diesel plants.

• Governments aiming for energy‑security gains by reducing imported fuel bills in geologically favourable regions.

• Infrastructure and private‑equity investors comfortable with drilling risk and long‑dated, contracted cash flows.

However, the same features that make geothermal attractive—deep drilling, site‑specific geology, and long development cycles—also mean higher upfront risk and lower geographical scalability than solar or onshore wind. Project economics hinge on well productivity, drilling costs, power‑purchase agreements, and the stability of regulatory regimes.

From a portfolio‑construction standpoint, exposure to countries that already produce the most geothermal power typically comes via:

• Listed utilities with diversified renewable fleets in the United States, New Zealand, the Philippines, and Turkey.

• Project developers and service providers with transferable subsurface expertise, often overlapping with oil and gas supply chains.

• Emerging‑market infrastructure deals in places like Indonesia and Kenya, where development banks and public entities often anchor financing structures.

For coverage at Moving Markets, stories on geothermal power should therefore connect country‑level production data with regulatory frameworks, capital‑market access, and the specific risk–return profile geothermal offers relative to other renewables and to conventional generation.