The Iowa Department of Revenue released the 2025 Retailers Motor Fuel Gallons Annual Report this week, showing E15 sales increased 60% last year in Iowa to over 410 million gallons sold. At the end of 2025, almost half of Iowa fuel stations offered E15, with the blend accounting for 27% of gasoline sales.

Renewable Fuels Association President and CEO Geoff Cooper says this shows what’s possible when E15 is given fair access to the marketplace. “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. “The massive growth in E15 sales reflects the success of Governor Reynolds’s E15 Access Standard,” said Iowa Renewable Fuels Association (IRFA) Executive Director Monte Shaw. “With Iowa drivers saving an average of 15 cents per gallon by choosing E15, the cost savings equal an estimated $61.5 million. E15 is well on its way to becoming the new normal fuel in Iowa.”

However, the report also showed that less than 51 million gallons of biodiesel were sold in Iowa last year, which is down from about 82 million gallons of biodiesel sold during 2024.

“2025 was the predictable result of being completely unsettled by federal policy,” commented Shaw. “Low RFS blend levels for 2025, combined with no guidance on federal tax credits during the same period, disrupted the biodiesel market. Iowa biodiesel took a big hit but can weather the storm and rebound quickly with the right policies put in place.”