Nuclear Energy Generation by State

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Last updated April, 2025

Nuclear energy remains a major power source in the U.S. Nuclear power accounts for 17.9% of the total electricity generated in the country, according to the most recent nuclear energy generation report. This report is based on the latest U.S. Energy Information Administration data, which shows nuclear generation by state from January 2025.

Which state generates the largest amount of energy from nuclear sources? The EIA’s most recent data shows that in January, it was Illinois, with 8,832 thousand megawatt-hours, followed by Pennsylvania – 6,963, and Alabama – 4,904.

The following states did not generate a significant amount of nuclear energy in January, so they will not be included in the findings below: Alaska, Colorado, Delaware, Hawaii, Idaho, Indiana, Iowa, Kentucky, Maine, Massachusetts, Montana, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Rhode Island, South Dakota, Utah, Vermont, West Virginia, and Wyoming.

The following charts are based on Choose Energy’s analysis of the EIA’s nuclear energy production data.

Across the country, electricity generation from nuclear power increased by approximately 1% from December 2024 to January 2025. The U.S. produced a total of 71,739 thousand megawatt-hours of nuclear power in January 2025. Texas’ nuclear power generation decreased by 5.2%. Minnesota experienced the highest increase in nuclear energy production at 22.4%, while production in Tennessee decreased by 5.5%, marking the most significant drop in the United States from December to January.

Following is a list of the states with significant nuclear energy generation, the amounts (in thousand megawatt-hours) produced in January 2025, and the percentage generation changed from the previous month.

New Hampshire produced the highest percentage of electricity from nuclear energy in November, 65% of the states’ electricity came from nuclear energy.

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