France Has the Highest Share of Nuclear Power, 68.3% in 2025
Among the 30 countries that generated at least 10 TWh of electricity in 2025, France got the largest share of it from nuclear: 68.3%. It is followed by Slovakia (66.4%), Czechia (42.3%) and Hungary (40.1%). The world average for nuclear was 8.8% in 2025.
Top 20, 2025
Highest share of each fuel| Country | Share from nuclear | Generation |
|---|---|---|
| 1. 🇫🇷 France | 68.3% | 392 TWh of 574 TWh |
| 2. 🇸🇰 Slovakia | 66.4% | 19.3 TWh of 29.1 TWh |
| 3. 🇨🇿 Czechia | 42.3% | 32.0 TWh of 75.5 TWh |
| 4. 🇭🇺 Hungary | 40.1% | 16.1 TWh of 40.1 TWh |
| 5. 🇫🇮 Finland | 39.8% | 32.8 TWh of 82.3 TWh |
| 6. 🇸🇮 Slovenia | 39.3% | 5.84 TWh of 14.9 TWh |
| 7. 🇧🇬 Bulgaria | 39.0% | 14.9 TWh of 38.1 TWh |
| 8. 🇧🇾 Belarus | 37.4% | 17.0 TWh of 45.4 TWh |
| 9. 🇧🇪 Belgium | 33.5% | 24.2 TWh of 72.1 TWh |
| 10. 🇨🇭 Switzerland | 29.9% | 19.4 TWh of 65.0 TWh |
| 11. 🇰🇷 South Korea | 29.4% | 185 TWh of 628 TWh |
| 12. 🇸🇪 Sweden | 27.4% | 46.7 TWh of 170 TWh |
| 13. 🇦🇪 United Arab Emirates | 21.2% | 39.1 TWh of 184 TWh |
| 14. 🇷🇴 Romania | 20.5% | 10.2 TWh of 49.8 TWh |
| 15. 🇪🇸 Spain | 18.8% | 54.1 TWh of 288 TWh |
| 16. 🇷🇺 Russia | 18.3% | 219 TWh of 1,194 TWh |
| 17. 🇺🇸 United States | 17.4% | 785 TWh of 4,520 TWh |
| 18. 🇵🇰 Pakistan | 14.0% | 24.0 TWh of 171 TWh |
| 19. 🇨🇦 Canada | 12.9% | 84.8 TWh of 660 TWh |
| 20. 🇬🇧 United Kingdom | 12.4% | 36.4 TWh of 294 TWh |
Countries that generated at least 10 TWh in 2025, 82 in this data. Smaller grids are left out so a tiny system does not top every list.
How the Leaders Got Here
2010 to 2025| Year | France | Slovakia | Czechia | Hungary | Finland |
|---|---|---|---|---|---|
| 2010 | 76.2% | 53.1% | 32.9% | 42.2% | 28.3% |
| 2011 | 77.9% | 54.5% | 32.6% | 43.6% | 31.6% |
| 2012 | 75.0% | 54.7% | 35.0% | 45.6% | 32.7% |
| 2013 | 73.5% | 55.2% | 35.8% | 50.8% | 33.1% |
| 2014 | 77.1% | 57.1% | 35.7% | 53.3% | 34.6% |
| 2015 | 76.2% | 56.9% | 32.5% | 52.2% | 33.9% |
| 2016 | 72.2% | 55.1% | 29.4% | 50.3% | 33.7% |
| 2017 | 71.7% | 55.0% | 33.1% | 48.9% | 33.3% |
| 2018 | 71.7% | 55.7% | 34.5% | 49.1% | 32.5% |
| 2019 | 70.6% | 54.2% | 35.3% | 47.5% | 34.8% |
| 2020 | 67.1% | 54.2% | 37.5% | 46.0% | 33.6% |
| 2021 | 68.9% | 53.0% | 36.7% | 44.3% | 32.7% |
| 2022 | 62.9% | 60.0% | 37.1% | 44.2% | 35.1% |
| 2023 | 65.2% | 62.1% | 40.1% | 44.8% | 42.1% |
| 2024 | 67.7% | 61.8% | 40.8% | 42.2% | 39.5% |
| 2025 | 68.3% | 66.4% | 42.3% | 40.1% | 39.8% |
Key Facts
- France generated 68.3% of its electricity from nuclear in 2025, the highest share of any country generating at least 10 TWh (392 TWh of 574 TWh).
- Slovakia was second with 66.4% in 2025.
- 20 of the 82 countries generating at least 10 TWh drew at least 10% of their electricity from nuclear in 2025.
- Nuclear supplied 8.8% of world electricity in 2025.
- In absolute terms, the United States generated the most nuclear electricity in 2025: 785 TWh.
Questions About This Ranking
Which country gets the most electricity from nuclear?
France, at 68.3% of its electricity in 2025, among countries generating at least 10 TWh. Second is Slovakia (66.4%). Figures are Ember annual statistics.
Which country generates the most nuclear electricity?
The United States generated the most nuclear electricity in 2025: 785 TWh, which is 17.4% of its own generation. Share and total are different rankings.
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. Annual statistics from Ember.
Related
Cite this page
World Power Monitor. (2025). Highest Nuclear Share of Electricity by Country, 2025. https://worldpowermonitor.com/records/highest-nuclear-share/
World Power Monitor. Highest Nuclear Share of Electricity by Country, 2025. Data as of 2025. Data from Ember. https://worldpowermonitor.com/records/highest-nuclear-share/
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year = {2025},
note = {Data as of 2025. Data from Ember.},
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} Permalink: https://worldpowermonitor.com/records/highest-nuclear-share/
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