Country energy profile · Iran · 2025
What percentage of Iran’s energy comes from fossil fuels?
In 2025, fossil fuels supplied 99.1% of Iran’s total energy. Natural gas is its largest single source. That compares with a world average of 86.2%.
Oil 29.1%, natural gas 69.5%, coal 0.5% · non-fossil 0.9%.
Source: Energy Institute Statistical Review of World Energy 2025 data. Site updated August 13, 2026.
Iran energy mix, 2025
Share of total primary energy by source
Key facts
| Fossil-fuel share | 99.1% |
| World average | 86.2% |
| Main fossil fuel | Natural gas |
| Change since 2010 | -0.5 pts |
| Fossil energy per person | 142.4 GJ |
| CO₂ per person | 8.0 t |
| Fossil share of electricity | 94.8% |
| World rank, fossil energy used | #6 of 80 |
Is Iran 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 Iran
Consumption by fuel, 1965–2025
Exajoules (EJ) per year
Total energy vs. electricity
Iran’s electricity has a lower fossil share than its overall energy use, because transport, heating and industry still lean heavily on oil, gas and coal.
Total energy
| Fossil share | 99.1% |
| Oil | 29.1% |
| Gas | 69.5% |
| Coal | 0.5% |
Electricity
| Fossil share | 94.8% |
| Low-carbon share | 5.2% |
| Nuclear + hydro | 4.4% |
| Wind + solar + other renewables | 0.9% |
Frequently asked questions
What percentage of Iran's energy comes from fossil fuels?
In 2025, fossil fuels supplied about 99.1% of Iran's total primary energy: oil 29.1%, natural gas 69.5% and coal 0.5%. The world average is 86.2%.
What is Iran's main energy source?
Iran's largest fossil fuel is natural gas. Non-fossil sources make up 0.9% of its energy.
Is Iran reducing its dependence on fossil fuels?
Since 2010, Iran's fossil-fuel share of energy has fallen by 0.5 percentage points, to 99.1%.
How much of Iran's electricity comes from fossil fuels?
About 94.8% of Iran's electricity came from fossil fuels in 2025, versus 99.1% of its total energy. Electricity is usually the lower-carbon of the two.
Compare with other countries
Source: Energy Institute Statistical Review of World Energy, 2025 data (annual series back to 1965). See methodology.