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

In 2019, about 4,127 billion kilowatthours (kWh) (or about 4.13 trillion kWh) of electricity were generated at utility-scale electricity generation facilities in the United States.1 About 63% of this electricity generation was from fossil fuels—coal, natural gas, petroleum, and other gases. About 20% was from nuclear energy, and about 18% was from renewable energy sources.

The U.S. Energy Information Administration estimates that an additional 35 billion kWh of electricity generation was from small-scale solar photovoltaic systems in 2019.2

U.S. utility-scale electricity generation by source, amount, and share of total in 20191Energy sourceBillion kWhShare of totalTotal - all sources4,127Fossil fuels (total)2,58262.6%Natural Gas1,58638.4%Coal96523.4%Petroleum (total)180.4%Petroleum liquids120.3%Petroleum coke70.2%Other gases130.3%Nuclear80919.6%Renewables (total)72817.6%Wind2957.1%Hydropower2887.0%Solar721.7%Photovoltaic691.7%Solar thermal30.1%Biomass (total)581.4%Wood390.9%Landfill gas100.3%Municipal solid waste (biogenic)60.1%Other biomass waste20.1%Geothermal150.4%Pumped storage hydropower3-5-0.1%Other sources3130.3%

1 Utility-scale electricity generation is electricity generation from power plants with at least one megawatt (or 1,000 kilowatts) of total electricity generating capacity. Data are for net electricity generation.
2 Small-scale solar photovoltaic systems are electricity generators with less than one megawatt of electricity generating capacity that are usually at or near the location where the electricity is consumed. Most small-scale solar photovoltaic systems are installed on building rooftops.
3Pumped storage hydroelectricity generation is negative because most pumped storage electricity generation facilities use more electricity than they produce on an annual basis. Most pumped storage systems use fossil fuels or nuclear energy for pumping water to the storage component of the system.

Learn more:
Electric Power Monthly: Chapter 1: Net Generation
Electric Power Annual: Chapter 3: Net Generation
Monthly Energy Review: Electricity
Energy Explained: Electricity in the United States