Country energy profile · Slovakia · 2025
What percentage of Slovakia’s energy comes from fossil fuels?
In 2025, fossil fuels supplied 62.0% of Slovakia’s total energy. Oil is its largest single source. That compares with a world average of 86.2%.
Oil 25.9%, natural gas 25.0%, coal 11.1% · non-fossil 38.0%.
Source: Energy Institute Statistical Review of World Energy 2025 data. Site updated August 13, 2026.
Slovakia energy mix, 2025
Share of total primary energy by source
Key facts
| Fossil-fuel share | 62.0% |
| World average | 86.2% |
| Main fossil fuel | Oil |
| Change since 2010 | -11.9 pts |
| Fossil energy per person | 73.3 GJ |
| CO₂ per person | 4.6 t |
| Fossil share of electricity | — |
| World rank, fossil energy used | #68 of 80 |
Is Slovakia getting less dependent on fossil fuels?
Fossil-fuel share of total energy since 1965, with the absolute amount of fossil fuel used. Share and volume can move in opposite directions.
Fossil share vs. consumption
Left axis: % of primary energy · Right axis: exajoules (EJ)
Oil vs. gas vs. coal in Slovakia
Consumption by fuel, 1965–2025
Exajoules (EJ) per year
Frequently asked questions
What percentage of Slovakia's energy comes from fossil fuels?
In 2025, fossil fuels supplied about 62.0% of Slovakia's total primary energy: oil 25.9%, natural gas 25.0% and coal 11.1%. The world average is 86.2%.
What is Slovakia's main energy source?
Slovakia's largest fossil fuel is oil. Non-fossil sources make up 38.0% of its energy.
Is Slovakia reducing its dependence on fossil fuels?
Since 2010, Slovakia's fossil-fuel share of energy has fallen by 11.9 percentage points, to 62.0%.
Compare with other countries
Source: Energy Institute Statistical Review of World Energy, 2025 data (annual series back to 1965). See methodology.