Maria Costello MBE is a British motorcycle racer who held the Guinness World Record for being the fastest woman to lap the Isle of Man TT course at an average speed of 114.73 mph until Jenny Tinmouth took the record at the 2009 TT.
Costello was the first woman (solo racer) in the history of the Isle of Man motorcycle races to stand on the podium when she took third place in the Ultra Lightweight category of the 2005 Manx Grand Prix.