|Birthplace||England Flag of United Kingdom|
|Death date||26 September 1959|
|Career wins||not found|
|Major racing wins, honours & awards|
|Major racing wins|
British Classic Race wins:|
1,000 Guineas Stakes (1953)
2,000 Guineas Stakes (1954)
|Manny Mercer Court, Newmarket, Suffolk|
|Happy Laughter, Wilwyn, Darius|
Emmanuel "Manny" Mercer (1928 - 26 September 1959) was a Thoroughbred horse racing jockey who was one of British racing's brightest stars when he died in a racing accident. A brother to jockey Joe Mercer, he was married to the daughter of trainer Harry Wragg. Their daughter, Carolyn, married jockey Pat Eddery.
A leading jockey throughout most of the 1950s, in 1954 Manny Mercer won eighty-eight races, finishing second in the jockey standings to Doug Smith. During his shortened career, Mercer won two British Classic Races, capturing the 1953 1,000 Guineas Stakes aboard Happy Laughter, and the 1954 2,000 Guineas Stakes on Darius. In 1952 he gained much media attention in the United States for his masterful ride on Wilwyn in winning the inaugural running of the Washington, D.C. International at Laurel Park Racecourse in Laurel, Maryland.
Manny Mercer died on 26 September 1959 when a filly named Priddy Fair threw him before the start of the Red Deer Stakes at Ascot Racecourse. Mercer was fatally kicked in the head as he fell to the ground. Reporting on his death, The Age newspaper in Melbourne, Australia called Mercer "one of Britain's most brillant race riders."  In a 2009 Racing Post article by John Cobb marking the fiftieth anniversary of Mercer's death, he was called "one of its [racing's] brightest stars."
Manny Mercer Court in Newmarket is named in his memory.