Bas Leinders (born 16 July 1975) is a professional racing driver from Belgium. He was a Formula One test and reserve driver in 2004 for the Minardi F1 team, taking part in the Friday practice sessions during Grand Prix weekends, making 17 appearances in all.
Born in Bree, Leinders was one of the most successful Belgian racing drivers of the nineties and the beginning of the 21st century. He started his career in karting, winning his very first race. At the age of 14 he was already a European Champion beating Jarno Trulli, Ralph Firman and others. In 1992 Leinders was an official works driver for the Italian Tony Kart outfit.
Leinders started his automobile career with the Formula Ford. He was not only crowned Benelux Champion but he also obtained the pole position at the prestigious Formula Ford Festival at his first participation, later becoming European and British Formula Ford Champion. Not being able to gather enough money to make the step to Formula Three, Leinders decided on the European Formula Opel Championship (for Van Amersfoort Racing). With a record of 8 wins he secured the Championship several races before the end.
With some more backing he graduated to the German Formula 3 series with VAR. The Belgian finished 2nd in his maiden F3 weekend just behind Nick Heidfeld. In his second year, he won the Championship and was invited by the McLaren Junior team to partner Nick Heidfeld in the last race of the Formula 3000 season. Leinders obtained his best F3000 results in 2001, finishing second twice behind Tomáš Enge and Justin Wilson respectively.