Iran, Islamic Republic of vs OECD (EI): Fossil fuel supply by source
Iran, Islamic Republic of
2,563 terawatt-hours
in 2025
OECD (EI)
18,113 terawatt-hours
in 2025
Iran, Islamic Republic of rank
5th
OECD (EI) rank
1st
Fossil fuel supply by source over time
- Iran, Islamic Republic of
- OECD (EI)
How they compare
OECD (EI) currently reports 18,113 terawatt-hours against 2,563 terawatt-hours in Iran, Islamic Republic of, a difference of 15,550 terawatt-hours.
That makes OECD (EI)'s figure about 7.1 times Iran, Islamic Republic of's.
Across all 61 years both countries report, OECD (EI) has been ahead every year.
Iran, Islamic Republic of ranks 5th and OECD (EI) ranks 1st of 77 countries.
OECD (EI) has averaged higher in every one of the 7 decades both report.
Head to head by decade
| Decade | Iran, Islamic Republic of | OECD (EI) | Difference | Ahead |
|---|---|---|---|---|
| 1960s | 8.91 terawatt-hours | 5,555 terawatt-hours | 5,546 terawatt-hours | OECD (EI) |
| 1970s | 40.03 terawatt-hours | 8,123 terawatt-hours | 8,083 terawatt-hours | OECD (EI) |
| 1980s | 91.27 terawatt-hours | 8,839 terawatt-hours | 8,747 terawatt-hours | OECD (EI) |
| 1990s | 332.77 terawatt-hours | 11,518 terawatt-hours | 11,185 terawatt-hours | OECD (EI) |
| 2000s | 959.69 terawatt-hours | 14,138 terawatt-hours | 13,179 terawatt-hours | OECD (EI) |
| 2010s | 1,794 terawatt-hours | 16,444 terawatt-hours | 14,651 terawatt-hours | OECD (EI) |
| 2020s | 2,437 terawatt-hours | 17,891 terawatt-hours | 15,454 terawatt-hours | OECD (EI) |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher fossil fuel supply by source, Iran, Islamic Republic of or OECD (EI)?
- OECD (EI), at 18,113 terawatt-hours against 2,563 terawatt-hours in Iran, Islamic Republic of as of 2025.
- What is the difference in fossil fuel supply by source between Iran, Islamic Republic of and OECD (EI)?
- 15,550 terawatt-hours, with OECD (EI) ahead.
- How many years of comparable data are there for Iran, Islamic Republic of and OECD (EI)?
- 61 years are reported by both, from 1965 to 2025.
- How do Iran, Islamic Republic of and OECD (EI) rank globally for fossil fuel supply by source?
- Iran, Islamic Republic of ranks 5th and OECD (EI) ranks 1st of 77 countries.
- Where does this data come from?
- Energy Institute - Statistical Review of World Energy (2026); Smil (2017) β with major processing by Our World in Data, published as Fossil fuel supply by source. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Measured in terawatt-hours of total energy supply.