Top 10 countries producing thermal energy 2025
Fossil-Fired Electricity Leaders in 2025
This ranking uses a clearly bounded metric: fossil-fired electricity generation. It includes electricity generated from coal, gas and oil. Nuclear is excluded because it is not fossil-fired, even though it is sometimes grouped under broad thermal generation.
The ranking uses 2024 full-year country values as the measured baseline for a 2025 snapshot because broad international electricity datasets are finalised after the year ends. This avoids comparing full-year country totals with partial-year updates.
What the top of the ranking shows
China and the United States remain far ahead in absolute fossil-fired generation. India is the main fast-growth case in the top three. The rest of the list is shaped by three different profiles: coal-led systems, gas-led systems and fuel-rich economies where gas or oil still dominates power generation.
Largest fossil-fired producer
China
China stays first because coal generation remains very large even while solar, wind and nuclear are expanding.
Metric boundary
Nuclear excluded
The table separates fossil-fired generation from nuclear generation, even where both are heat-based technologies.
Main comparison unit
TWh
Terawatt-hours show absolute output, which is the right unit for grid-scale and fuel-market comparisons.
Important limit
Not emissions rank
The ranking measures generation volume. It does not directly rank emissions, carbon intensity, prices or reliability.
Country context behind the leaders
China
China’s fossil-fired total is driven mainly by coal. The country is also adding clean electricity at enormous scale, so fossil volume and transition speed have to be read together.
United States
The United States is gas-led. Coal has declined over the long run, but fossil gas keeps the country near the top of the fossil-fired generation table.
India
India remains coal-heavy because electricity demand is still rising quickly and coal generation supplies most of the dispatchable volume.
Gas and coal systems
Saudi Arabia, Iran and Mexico are gas-heavy; Indonesia and South Korea retain large fossil generation for industry, reliability and peak demand.
Ranking table: fossil-fired electricity generation
Values are shown in TWh and refer to full-year 2024 output used as the measured baseline for this 2025 snapshot. The ranking separates coal, gas and oil generation from nuclear and renewable generation.
| Rank | Country | Fossil-fired generation | Main fossil profile |
|---|---|---|---|
| 1 | China | 6,237.2 TWh | Coal-led system |
| 2 | United States | 2,552.5 TWh | Gas-led with remaining coal |
| 3 | India | 1,584.8 TWh | Coal-led growth system |
| 4 | Russia | 775.5 TWh | Gas-heavy system |
| 5 | Japan | 698.4 TWh | Gas and coal |
| 6 | Saudi Arabia | 444.8 TWh | Gas and oil |
| 7 | South Korea | 375.9 TWh | Coal and gas |
| 8 | Iran | 367.9 TWh | Gas-dominated system |
| 9 | Indonesia | 304.3 TWh | Coal-led system |
| 10 | Mexico | 249.5 TWh | Gas-heavy system |
Values are rounded to one decimal place. The metric is coal plus gas plus oil electricity generation. Nuclear is excluded from this fossil-fired total.
Chart: fossil-fired electricity by country
The chart shows the concentration clearly: China is in a separate scale tier, followed by the United States and India. The remaining countries are much closer to one another.
If the chart does not render, the ranked bars still show all 10 countries in the same order and relative scale.
Methodology
The ranking measures fossil-fired electricity generation: coal electricity plus gas electricity plus oil electricity. Nuclear is excluded. This boundary is important because the word thermal can include both fossil-fired plants and nuclear plants, even though their fuel use and emissions profiles are fundamentally different.
The baseline year is 2024 because it is the latest full-year country dataset available for consistent international comparison. The 2025 framing reflects the current power-sector context while keeping the table anchored to complete annual data.
Values are shown in terawatt-hours and rounded to one decimal place. The table is sorted by the fossil-fired total. It is not a ranking of total electricity generation, total primary energy use, carbon intensity, installed capacity or electricity access.
The main limitation is that fossil-fired generation volume is not the same as emissions intensity. A gas-heavy system and a coal-heavy system can sit close together in TWh while having different emissions profiles.
What this means for readers
The ranking shows where fossil fuel demand remains closely tied to electricity systems. Large coal-led systems affect coal trade, mining investment, grid emissions and air-quality policy. Large gas-led systems are more exposed to gas prices, LNG markets and fuel-security debates.
The top three show different transition challenges. China has the largest fossil-fired base but also the largest clean-power build-out. The United States has shifted away from coal but remains strongly gas-dependent. India is still adding demand from a lower per-capita electricity base, which makes coal displacement harder in the short run.
The lower half of the Top 10 shows why the fuel profile matters. Saudi Arabia, Iran and Mexico are gas-heavy, while Indonesia is coal-led and South Korea combines coal and gas alongside a large nuclear fleet that is outside the fossil-fired total.
FAQ
Why not use broad thermal electricity?
Broad thermal electricity can include nuclear, while many readers use thermal to mean fossil. Fossil-fired generation is clearer because it counts coal, gas and oil only.
What exactly is counted in fossil-fired electricity?
Coal, natural gas and oil-fired electricity generation are counted. Nuclear, hydropower, wind, solar, bioenergy and other renewables are excluded.
Why is France not included in this fossil-fired ranking?
France is a large electricity producer mainly because of nuclear generation. Its fossil-fired generation is much smaller, so it does not belong in a coal, gas and oil generation ranking.
Why use 2024 data for a 2025 snapshot?
Full-year country electricity data becomes internationally comparable after the year closes. The 2024 baseline keeps all rows on the same annual reference period.
Does a high fossil rank mean the dirtiest power system?
Not necessarily. This is an absolute TWh ranking. Carbon intensity depends on the mix of coal, gas and oil, plant efficiency and total electricity output.
Sources
Ember — Yearly Electricity Data
Primary source for country-level electricity generation by source, used to identify coal, gas and oil generation totals.
https://ember-energy.org/data/yearly-electricity-data/Ember — Electricity Data Explorer
Used to check country-level fossil, clean and total electricity generation profiles.
https://ember-energy.org/data/electricity-data-explorer/Our World in Data — Electricity production by source
Used as an accessible reference for electricity generation by source and long-run context.
https://ourworldindata.org/grapher/electricity-prod-source-stackedIEA — Global Energy Review 2025, Electricity
Used for electricity demand and power-sector context around the 2024–2025 period.
https://www.iea.org/reports/global-energy-review-2025/electricity
