What is the difference in share of primary energy use by source between Iran, Islamic Republic of and USSR?

34.8%, with Iran, Islamic Republic of ahead.

How many years of comparable data are there for Iran, Islamic Republic of and USSR?

20 years are reported by both, from 1965 to 1984.

Where does this data come from?

Energy Institute - Statistical Review of World Energy (2026); Smil (2017); U.S. Energy Information Administration (2026) – with major processing by Our World in Data, published as Share of primary energy use by source. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Iran, Islamic Republic of vs USSR: Share of primary energy use by source

Iran, Islamic Republic of

69.5%

in 2025

USSR

34.7%

in 1984

Iran, Islamic Republic of rank

5th

USSR rank

25th

Share of primary energy use by source over time

Iran, Islamic Republic of
USSR

How they compare

Iran, Islamic Republic of currently reports 69.5% against 34.7% in USSR, a difference of 34.8%.

That makes Iran, Islamic Republic of's figure about 2.0 times USSR's.

Across all 20 years both countries report, USSR has been ahead every year.

Iran, Islamic Republic of ranks 5th and USSR ranks 25th of 77 countries.

USSR has averaged higher in every one of the 3 decades both report.

Head to head by decade

Decade	Iran, Islamic Republic of	USSR	Difference	Ahead
1960s	7.8%	19.7%	11.8%	USSR
1970s	14.2%	25.0%	10.8%	USSR
1980s	13.8%	31.5%	17.7%	USSR

Averages of every year both report within each decade.

Frequently asked questions

Which has higher share of primary energy use by source, Iran, Islamic Republic of or USSR?: Iran, Islamic Republic of, at 69.5% against 34.7% in USSR as of 2025.
What is the difference in share of primary energy use by source between Iran, Islamic Republic of and USSR?: 34.8%, with Iran, Islamic Republic of ahead.
How many years of comparable data are there for Iran, Islamic Republic of and USSR?: 20 years are reported by both, from 1965 to 1984.
How do Iran, Islamic Republic of and USSR rank globally for share of primary energy use by source?: Iran, Islamic Republic of ranks 5th and USSR ranks 25th of 77 countries.
Where does this data come from?: Energy Institute - Statistical Review of World Energy (2026); Smil (2017); U.S. Energy Information Administration (2026) – with major processing by Our World in Data, published as Share of primary energy use by source. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Iran, Islamic Republic of vs USSR: Share of primary energy use by source. Statizoid, drawing on Energy Institute - Statistical Review of World Energy (2026); Smil (2017); U.S. Energy Information Administration (2026) – with major processing by Our World in Data. Retrieved 22 August 2026, from https://energy.statizoid.com/compare/share-of-primary-energy-by-source/iran-islamic-rep/ussr/

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About this data

Indicator: Share of primary energy use by source
Unit: %
Source: Energy Institute - Statistical Review of World Energy (2026); Smil (2017); U.S. Energy Information Administration (2026) – with major processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 79 places, 4,176 data points, 1965–2025
Last refreshed: 11 August 2026

Measured as a percentage of total energy supply.