James Marsh may refer to:
- James Marsh (artist) (born 1946), English artist
- James Marsh (chemist) (1794–1846), British chemist
- James Marsh (cricketer) (1870–1930), English cricketer and clergyman
- James Marsh (director) (born 1963), British film director
- James Marsh (British Army officer) (died 1804), British general
- James Marsh (philosopher) (1794–1842), American Christian transcendentalist philosopher and president of the University of Vermont
- James Marsh (priest) (1848–?), English Anglican priest
- James Barney Marsh (1856–1936), American engineer and bridge designer
- James Harley Marsh (born 1943), Canadian editor and writer
- James Holt Marsh (1866–1928), rugby union footballer of the 1880s, and 1890s for Scotland, England, Edinburgh Institute F.P., and Swinton
- James Randall Marsh (1896–1965), American artist
- Jim Marsh (ice hockey) (born 1951), Canadian ice hockey player
- Jim Marsh (American football), American football coach in the United States
- Jim Marsh (basketball) (1946–2019), American basketball player
- James Marsh (basketball) (born 1970), American-German player for the Germany national basketball team
- Jamie Marsh (born 1966), American actor
- James Marsh (comedian), known as Jimmy Jewel