Joel Rosario (born January 14, 1985) is a jockey in American Thoroughbred horse racing, originally from the Dominican Republic. In the space of five weeks in 2013 he rode the winners of the Dubai World Cup and the Kentucky Derby.
On December 11, 2009, Rosario equaled a Hollywood Park Racetrack record when he won six races on a single race card. Previously, the feat had been achieved by Hall of Fame jockeys Bill Shoemaker (1953, 1970), Laffit Pincay, Jr. (1968), and Kent Desormeaux (1992).
On March 30, 2013 Rosario won the world's richest horse race, the US$10 million Dubai World Cup at Meydan Racecourse in Dubai, aboard the US-based stallion Animal Kingdom. The same year, on May 4, 2013 he won the Kentucky Derby aboard the colt Orb. On June 20, 2013 Rosario won the Norfolk Stakes aboard No Nay Never at Royal Ascot, and broke the 5 furlong track record for two-year-olds. In 2014, he won the Belmont Stakes on Tonalist. In April 2015, he surpassed 2,000 career wins.