Ranking · Clean power · 32 countries · data 2025
Countries ranked by nuclear electricity generation
United States ranks first with 784.8 TWh, ahead of China (487.6 TWh) and France (392.1 TWh). The world figure is 2,811.6 TWh. 32 countries ranked, latest data 2025.
Total nuclear generation per year. The United States runs the world's largest fleet, followed by China, whose output has grown fastest, and France.
Ranking rule. Only countries with a reported value for 2020 or later are ranked.
Full ranking
| # | Country | Continent | Nuclear generation (TWh) | Year |
|---|---|---|---|---|
| 1 | United States | North America | 784.8 | 2025 |
| 2 | China | Asia | 487.6 | 2025 |
| 3 | France | Europe | 392.1 | 2025 |
| 4 | Russia | Europe | 218.7 | 2025 |
| 5 | South Korea | Asia | 184.7 | 2025 |
| 6 | Japan | Asia | 94.1 | 2025 |
| 7 | Canada | North America | 85.3 | 2025 |
| 8 | Ukraine | Europe | 62.2 | 2022 |
| 9 | Spain | Europe | 54.1 | 2025 |
| 10 | India | Asia | 53.8 | 2025 |
| 11 | Sweden | Europe | 47.1 | 2025 |
| 12 | United Arab Emirates | Asia | 40.6 | 2024 |
| 13 | United Kingdom | Europe | 36.4 | 2025 |
| 14 | Finland | Europe | 32.8 | 2025 |
| 15 | Czechia | Europe | 31.9 | 2025 |
| 16 | Belgium | Europe | 24.1 | 2025 |
| 17 | Pakistan | Asia | 23.7 | 2025 |
| 18 | Switzerland | Europe | 19.4 | 2025 |
| 19 | Slovakia | Europe | 19.3 | 2025 |
| 20 | Belarus | Europe | 17 | 2025 |
| 21 | Hungary | Europe | 16.1 | 2025 |
| 22 | Brazil | South America | 15.9 | 2025 |
| 23 | Bulgaria | Europe | 14.9 | 2025 |
| 24 | Argentina | South America | 10.8 | 2025 |
| 25 | South Africa | Africa | 10.2 | 2025 |
| 26 | Romania | Europe | 10.2 | 2025 |
| 27 | Mexico | North America | 10.2 | 2025 |
| 28 | Iran | Asia | 7.4 | 2025 |
| 29 | Slovenia | Europe | 5.8 | 2025 |
| 30 | Netherlands | Europe | 4 | 2025 |
| 31 | Taiwan | Asia | 3.3 | 2025 |
| 32 | Armenia | Asia | 2.6 | 2025 |
| World | 2,811.6 |
Leaders by continent
Africa
- South Africa10.2 TWh
Asia
- China487.6 TWh
- South Korea184.7 TWh
- Japan94.1 TWh
North America
- United States784.8 TWh
- Canada85.3 TWh
- Mexico10.2 TWh
Nuclear generation: frequently asked questions
Which country has the highest nuclear generation?
United States, at 784.8 TWh (2025). The rest of the top five: China 487.6 TWh, France 392.1 TWh, Russia 218.7 TWh, and South Korea 184.7 TWh.
What is the world average nuclear generation?
The world figure is 2,811.6 TWh (2025). 0 of the 32 ranked countries are above it; the median country sits at 23.7 TWh.
Which continent leads on nuclear generation?
Europe (943.8 TWh) leads among continents, while Africa (7.8 TWh) trails. Continental leaders: Africa: South Africa; Asia: China; Europe: France; North America: United States; South America: Brazil.
What does “Nuclear generation” measure?
Total electricity generated by nuclear reactors in a year, in terawatt-hours. Only countries with a reported value for 2020 or later are ranked.
Related rankings
Renewable shareSolar shareWind shareHydro shareNuclear shareLow-carbon shareSolar generationWind generationSolar per personWind per personCoal shareGas shareCarbon intensityCarbon intensityElectricity per personEnergy per personSolar share change (10 yr)Renewable share change (10 yr)Coal share change (10 yr)Net imports All rankings →
Sources & references
- Our World in Data: Energy dataset (CC BY 4.0) — compiled from the sources below
- Ember: Yearly Electricity Data — generation, shares, carbon intensity
- Energy Institute: Statistical Review of World Energy — primary energy, fossil production
- U.S. Energy Information Administration: International Energy Data — gap-filling for smaller countries