US states by nuclear electricity generation
Illinois had the highest nuclear electricity generation of 29 states in 2020, at 100.25 TWh. Iowa had the lowest, at 2.9 TWh. The median was 18.22 TWh and the figure for the United States was 789.88 TWh. Source: the U.S. Energy Information Administration.
All states, 2020
Full ranking
| Rank | States | 2020 | Change on 2019 |
|---|---|---|---|
| 1 | Illinois | 100.25 | +1.5% |
| 2 | Pennsylvania | 76.52 | -8.1% |
| 3 | South Carolina | 54.75 | -2.4% |
| 4 | Alabama | 43.55 | -0.2% |
| 5 | North Carolina | 42.33 | +1% |
| 6 | Texas | 41.44 | +0.3% |
| 7 | New York | 38.43 | -14.3% |
| 8 | Tennessee | 36.69 | +2.7% |
| 9 | Georgia | 32.83 | -2.3% |
| 10 | Arizona | 31.55 | -1.2% |
| 11 | Michigan | 30.33 | -7.8% |
| 12 | Virginia | 30.14 | +2.2% |
| 13 | Florida | 29.42 | +1.1% |
| 14 | New Jersey | 26.74 | +0.4% |
| 15 | Ohio | 18.22 | +7.1% |
| 16 | Louisiana | 16.95 | +21.2% |
| 17 | California | 16.26 | +0.6% |
| 18 | Connecticut | 15.71 | -6.1% |
| 19 | Maryland | 15.08 | +0.5% |
| 20 | Arkansas | 15.06 | +11% |
| 21 | Minnesota | 14.68 | +4.1% |
| 22 | Kansas | 10.58 | +14.4% |
| 23 | New Hampshire | 9.87 | -9.6% |
| 24 | Wisconsin | 9.77 | -2.6% |
| 25 | Washington | 9.43 | +6.3% |
| 26 | Missouri | 7.74 | -15.8% |
| 27 | Mississippi | 6.47 | -41.3% |
| 28 | Nebraska | 6.19 | -11% |
| 29 | Iowa | 2.9 | -44.5% |
Other periods
About this ranking
Net electricity generated by nuclear power plants in the year, in terawatt hours, as reported to the U.S. Energy Information Administration on Form EIA-923.
United States and its states only. States without a nuclear plant have no value; a state's series stops when its last reactor closes.
Every value in the ranking comes from the same publisher and the same period, so the states are compared on one definition. 2 states with data in other periods have no value for 2020 and are left out rather than filled from another source. Equal values share a rank.
How to cite
Source: U.S. Energy Information Administration. Electricity data browser: net generation, nuclear, all sectors, annual (EIA-923). Retrieved through Data Commons (datacommons.org). https://www.eia.gov/electricity/data/browser/. Retrieved 2026-10-11.Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank US states by nuclear electricity generation using official data, and cite the source.
rank_places {"indicator":"electricity_generation_nuclear","level":"region","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=electricity_generation_nuclear&level=region&within=United%20States&limit=10Questions
Which state has the highest nuclear electricity generation?
Illinois, with 100.25 TWh in 2020, according to the U.S. Energy Information Administration.
Which state has the lowest nuclear electricity generation?
Iowa, with 2.9 TWh in 2020.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Energy Information Administration, Electricity data browser: net generation, nuclear, all sectors, annual (EIA-923). Retrieved 2026-10-11. 2 states have no value for 2020 and are not ranked.