Martin Frank Stainforth (14 August 1866 – 22 April 1957) was a British-born artist best known for his portraits of Thoroughbred racehorses he painted in England and while living in Australia and the United States.
The quality of his work brought invitations to exhibit at the Royal Academy as well as at venues in Berlin, Germany; Brussels, Belgium; and Paris, France.
At the beginning of the 20th century, he began working as a magazine illustrator but a visit to North Queensland, Australia in 1908 led to his settling there and developing his skills as a painter of animals and especially equine portraiture.
Martin Stainforth lived in Sydney for close to twenty years but around 1928 he spent time in New Zealand before returning to his native England in 1930 where he was commissioned to do the portraits of a number of racehorses including Hyperion for Edward Stanley, 17th Earl of Derby and other prominent owners such as King George V. Near the end of 1934, Stainforth moved to New York City where he would remain for nearly fifteen years, spending considerable time at the hotel Breslin.
Some of his works can be seen at the Australian Jockey Club at Randwick Racecourse near Sydney, New South Wales as well as at the National Museum of Racing and Hall of Fame in Saratoga Springs, New York.