In 2025, Illinois' electricity consumption is dominated by low-carbon sources, which contribute to more than two-thirds of the energy mix. Nuclear power stands out as the major contributor, accounting for almost half of the electricity consumed in the state. The use of fossil fuels remains significant, with coal and gas collectively making up almost a third of the electricity supply. Wind energy provides almost 13% of electricity, representing the second largest source of low-carbon energy in Illinois. Meanwhile, solar energy contributes a smaller share, approximately 4.5%, with utility-scale installations making up most of this contribution.
Data sources used on this page include EIA. More about data sources →
Is Electricity Growing in Illinois?
Electricity consumption in Illinois is on an upward trajectory, with 2025 seeing a substantial rise in per capita usage compared to the previous year. The current consumption of 15,499 kWh per person indicates an increase of 807 kWh per person from 2024, highlighting a strong demand for energy in the state. Low-carbon electricity generation has also shown growth, with an increase of 273 kWh per person compared to the previous record in 2024. This indicates a positive trend towards more sustainable energy consumption, although the pace of growth in clean energy still demands further acceleration to meet overall energy needs while reducing emissions.
Suggestions
To further increase low-carbon electricity generation, Illinois could significantly benefit from expanding its existing nuclear and wind power capacities. Regions like Iowa and South Dakota, which derive about 58% of their electricity from wind, serve as excellent examples of how Illinois might expand its wind infrastructure. Moreover, the adoption of successful solar strategies from countries such as North Macedonia and states like Nevada, which harness a substantial percentage of their electricity from solar energy, could offer valuable insights. France and Slovakia, with their robust nuclear programs, demonstrate the immense potential of nuclear energy in providing large-scale, reliable, and clean electricity, a model that Illinois could effectively emulate to secure its energy future.
History
Historically, low-carbon electricity in Illinois has seen variable growth over recent years. In 2024, there was a notable increase in wind power generation by 3.1 TWh. That same year, nuclear energy also saw a smaller increase of 1.7 TWh. However, 2025 witnessed a slight decline in nuclear output, decreasing by 1.5 TWh, which is concerning. In contrast, wind energy growth slowed, but it still experienced a minor increase of 0.1 TWh. While these fluctuations in energy generation showcase dynamic changes, they also underline the urgent need for strategic policy and investments to ensure a consistent upward trajectory in low-carbon energy production, especially through robust nuclear and wind development.
