Between September 2024 and August 2025, Illinois saw over two-thirds of its electricity coming from low-carbon sources. In particular, nuclear energy dominated, contributing more than half to the state's electricity supply. Wind and solar also played important roles, together accounting for about 17% of the total electricity generated. Meanwhile, fossil fuel-based energy sources made up nearly one-third of the electricity consumed, with natural gas contributing around one-sixth and coal rounding out the rest. This distribution indicates a significant tilt towards cleaner electricity generation in Illinois, reflecting a robust commitment to reducing carbon emissions and minimizing environmental impact.
Data sources used on this page include EIA. More about data sources →
Is Electricity Growing in Illinois?
While overall electricity consumption has not yet returned to its historic high, Illinois is making commendable strides in the realm of low-carbon generation. The state’s latest electricity use stands at 15,292 kWh per person, a slight drop from the record set in 2007, showing a decrease of 481 kWh per person. However, it's important to note that low-carbon electricity reached new heights, increasing by 295 kWh per person from the previous year. This growth signifies a successful transition towards cleaner energy sources, proving that while total consumption may have stabilized, the clean energy sector is thriving and expanding within the state.
Suggestions
Illinois can further increase its low-carbon electricity generation by expanding existing successful operations, particularly in nuclear and wind energy, which already boast impressive contributions to the electricity mix. The state can look to Iowa and South Dakota, where wind accounts for 60% and 56% of electricity, respectively, as models for maximizing wind potential. Additionally, in regions such as France and Slovakia, nuclear energy leads with over two-thirds of their electricity powered by clean sources, showcasing the potential of nuclear expansion. Similarly, California's significant solar efforts, with nearly 30% generated from the sun, provide insights into enhancing solar capacity in Illinois. By learning from these regions, Illinois can further solidify its position as a leader in low-carbon electricity generation.
History
Looking back, from the late 2000s into the early part of the next decade, Illinois experienced consistent and remarkable growth in wind electricity generation, with notable increments recorded nearly every year. During this time, nuclear energy also showed significant advancements with a few years of impressive gains, despite occasional setbacks. Since then, the progress has been more varied but largely positive, with wind energy seeing a major leap in 2022 and solar energy taking significant steps forward in 2025. While there were some years, such as 2017 and 2021, where nuclear generation saw declines, the long-term trend has been upwards for both wind and nuclear. The recent expansion of solar energy sets a promising precedent for the continued diversification and strengthening of Illinois's clean energy portfolio.
