The 2009 Acura Sports Car Challenge of Mid-Ohio was the sixth round of the 2009 American Le Mans Series season. It took place at the Mid-Ohio Sports Car Course, Lexington, Ohio on August 8, 2009. Gil de Ferran and Simon Pagenaud won their fourth consecutive race, beating the Highcroft Racing Acura by 8.3 seconds. After losing out at the previous round at Lime Rock Park, Fernández Racing Acura won the LMP2 category for the fifth time this season, ahead of class newcomer Team Cytosport's Porsche RS Spyder. Flying Lizard Motorsports also continued their winning streak by claiming the GT2 class victory, beating the debuting revamped Corvette Racing Corvette C6.R. Martin and Melanie Snow won the ALMS Challenge class by a gap of two laps over the second place Orbit Racing Porsche.
