Frequently Asked Questions

What is U.S. electricity generation by energy source?

In 2012, the United States generated about 4,054 billion kilowatthours of electricity.  About 68% of the electricity generated was from fossil fuel (coal, natural gas, and petroleum), with 37% attributed from coal.

Energy sources and percent share of  total electricity generation in 2012 were: 

  • Coal 37%
  • Natural Gas 30%
  • Nuclear 19%
  • Hydropower 7%
  • Other Renewable 5%
    • Biomass 1.42%
    • Geothermal 0.41%
    • Solar 0.11%
    • Wind 3.46%
  • Petroleum 1%
  • Other Gases < 1%

Learn more:

Monthly Energy Review

Last updated: May 9, 2013 


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