Mark Guidry (born August 6, 1959 in Lafayette, Louisiana) is a retired American jockey.
He began his riding career in Thoroughbred horse racing in his native Louisiana in 1974 where he remained until 1986 when he went to race in Illinois. He was the leading jockey at Hawthorne Race Course seven times, Sportsman's Park nine times, and two times at Arlington Park. Guidry earned his 5,000th career win at Churchill Downs on May 4, 2007.
In 1997, Hawthorne Race Course voted him into their Racing Hall of Fame. In 2006 he was voted the George Woolf Memorial Jockey Award and was nominated to the National Museum of Racing and Hall of Fame.
In the 2007 Kentucky Derby, Guidry rode 50-1 longshot Imawildandcrazyguy to a fourth-place finish. He retired on November 10, 2007 having won 5,043 races during his riding career.
Mark Guidry currently resides in Louisville, Kentucky, with his wife Tina, and children Marcus, Mecus and Fallon.
Mark Guidry has returned to the state of Louisiana and is currently a competitive horse racing owner and trainer of American Thoroughbreds.