E15 accounted for more than 27 percent of total gasoline sales in Iowa in 2025, according to data released today by the Iowa Department of Revenue. The data show that more than 410 million gallons of E15 were sold in the Hawkeye state last year, up 60 percent from 2024. According to the agency, E15 is now available at roughly half of the state’s retail gas stations.
“This new data from the Iowa Department of Revenue shows what is possible when E15 is given fair access to the marketplace and consumers are given a choice to purchase the fuel,” said RFA President and CEO Geoff Cooper. “E15’s market share in Iowa has gone from just a sliver of the gasoline pool several years ago to more than a quarter of total volume today. Iowa drivers are clearly responding to E15’s lower price at the pump, its performance in their vehicles, and its positive impact on the environment. Iowa is again setting the pace when it comes to using homegrown renewable fuels, and we encourage other states to follow their lead.”
Iowa adopted the E15 Access Standard several years ago, compelling most retailers in the state to make the fuel available to consumers by Jan. 1, 2026. According to the IDOR, E15 “…saw tremendous growth, an increase of reported sales by over 150 million gallons with the implementation of the E15 Access Standard.”
Notably, growth in E15 sales volumes far outpaced growth in the number of stations offering E15. Between 2024 and 2025, Iowa added 293 new E15 locations (a 40 percent increase), while E15 sales volumes were up 60 percent. E15 accounted for just over 17 percent of total gasoline sales in 2024, 10 percentage points lower than in 2025.
Thanks to rapid growth in E15 and continued sales of E85, the average gallon of gasoline consumed in 2025 contained 11.1 percent ethanol.
