Iowa has the most number of operating ethanol biorefineries among all U.S. states. As of 2024, there were ** such refineries in the Midwestern state. Nebraska ranked second that year with ** sites. Meanwhile, Missouri and North Dakota each had *** biorefineries. Iowa also has the largest ethanol production capacity in the United States.
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RFA. (February 20, 2025). States with the highest number of ethanol biorefineries installed in the United States in 2024 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 20, 2026, from /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/
RFA. "States with the highest number of ethanol biorefineries installed in the United States in 2024." Chart. February 20, 2025. ÌÇÐÄÆÆ½â°æ. Accessed July 20, 2026. /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/
RFA. (2025). States with the highest number of ethanol biorefineries installed in the United States in 2024. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 20, 2026. /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/
RFA. "States with The Highest Number of Ethanol Biorefineries Installed in The United States in 2024." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 20 Feb 2025, /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/
RFA, States with the highest number of ethanol biorefineries installed in the United States in 2024 ÌÇÐÄÆÆ½â°æ, /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/ (last visited July 20, 2026)
States with the highest number of ethanol biorefineries installed in the United States in 2024 [Graph], RFA, February 20, 2025. [Online]. Available: /statistics/374464/leading-us-states-based-ethanol-biorefineries-installed/