Aaro Vainio is a Finnish racing driver. Vainio has enjoyed a successful karting career. He won the Finnish championship in 2007 and in 2008 he won the European KF3 Championship and the Junior Monaco Kart Cup. In 2009 he was runner-up in the CIK-FIA Karting World Championship and won the European KF1 Champion. For the 2011 racing season, Vainio moved into the GP3 series with Tech 1 Racing. He achieved a podium finish in his third race but only scored points twice during the remainder of the season, ultimately finishing 15th in the standings. He took his maiden series win in the first ever GP3 race in Monaco.