Leach is a surname, originally denoting a physician (in reference to the medical practice of bloodletting). Notable people with the surname include:
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Al Leach (1935–2024), Canadian transportation executive and politician
Archie Leach (1904–1986), real name of English-American actor Cary Grant
Aubrey Leach (born 1996), American softball player
Ben Leach (born 1969), player in English pop group The Farm
Bernard Leach (1887–1979), British studio potter and art teacher
Bobby Leach (1858–1926), English circus performer, went over Niagara Falls in a barrel
Buddy Leach (1934–2022), American politician
Britt Leach (born 1938), American character actor
Cecil Leach (1894–1973), English cricketer
Dewitt C. Leach (1822–1909), U.S. Representative from Michigan
David Leach (disambiguation)
Dominique Leach, American chef
Edmund Leach (1910–1989), British anthropologist
Sir Edward Pemberton Leach (1847–1913), Irish general in the British Army, recipient of the Victoria Cross
Edward G. Leach, American politician
Elizabeth Eva Leach, British medievalist, musicologist and academic
Ellie Leach (born 2001), English actress
Ethel Leach (1850 or 1851 – 1936), British politician
Esther Leach (1809–1843), English-Indian actress
Foss Leach (1942- ), New Zealand anthropologist
Francis Leach (born 1968), Australian radio announcer
Garry Leach (1954–2022), British comics artist and publisher
George Leach (musician), Canadian musician and actor
George E. Leach (1876–1955), United States Army general and politician
H-M
Helen Leach (1945–2026), New Zealand anthropologist
Henry Leach (British Army officer) (1870–1936), British Army general
Sir Henry Leach (1923–2011), Royal Navy admiral
Henry Goddard Leach (1880–1970), American Scandinavian studies scholar
Howard H. Leach, American diplomat
Jack Leach, English cricketer
Jalal Leach (born 1969), American baseball player
James Madison Leach (1815–1891), American politician from North Carolina
James Leach (soldier) (1892–1957), British soldier and Victoria Cross holder
Jan E. Leach (born 1952/1953), American plant pathologist
Jason Leach (born 1982), American football player
Jasper Leach (born 1986), American musician, writer, and recording engineer
Jesse Leach (born 1978), American musician
Jim Leach (1942–2024), American politician from Iowa
Joe Leach (born 1990), English cricketer
John Leach (disambiguation)
Joshua A. Leach (1843–1919) — founder of the Brotherhood of Locomotive Firemen
N-W
Neil Leach, British architect and theorist
Nicole Leach (born 1979), American actress and singer
Penelope Leach (born 1937), British child psychologist and parenting author
Reggie Leach (born 1950), Canadian professional ice hockey player
Rick Leach (born 1964), American tennis player and coach
Rick Leach (baseball) (born 1957), American baseball and football player
Robert M. Leach (1879–1952), United States Representative from Massachusetts
Robert E. Leach (1911–1993), Republican judge in the U.S. State of Ohio
Robin Leach (1941–2018), English entertainer
Rosemary Leach (1935–2017), English stage, television and film actress
Sheryl Leach (born 1952), American children's TV show creator and author, known for the series Barney & Friends
Steve Leach (ice hockey) (born 1966), American ice hockey player
Steve Leach (cricketer) (born 1993), English cricketer
Terry Leach (born 1954), former Major League Baseball player
Tommy Leach (1877–1969), Major League Baseball player