Marcus Maskell Marsh (1904-1983) was an English racehorse trainer whose British Classic wins included the Epsom Derby and St. Leger with Tulyar (1952) and Windsor Lad (1934) as well as the 2,000 Guineas with Palestine (1950). He was British flat racing Champion Trainer in 1952.
Marsh's career spanned over forty years until his retirement in 1964 with a break during World War II when he served in the RAF.
In 1968 Marsh published his autobiography, Racing with the Gods.
- Racing with the Gods Marcus Marsh 1968 ISBN 0498074609