Marchant is a surname. Notable people with the surname include:
Chesten Marchant (died 1676), last monoglot Cornish speaker
Edward Dalton Marchant (1806–1887), American artist
George Marchant (1857–1941), Australian soft-drink manufacturer and philanthropist
Henry Marchant (1741–1796), American lawyer and delegate to the Continental Congress (1777 to 1779)
Sir Herbert Stanley Marchant 20th Century British diplomat and writer
Jeremy Marchant Forde (born 1966), English biologist
John Le Marchant (British Army officer, born 1766) (1766–1812), English major-general
Sir John Le Marchant (British Army officer, born 1803) (1803–1874), English general and Governor of Newfoundland
Julio Marchant (born 1980), Argentine football (soccer) player
Katy Marchant (born 1993), British track cyclist
Kenny Marchant (born 1951), Republican member of US House of Representatives
Stephen Marchant (1912–2003), Australian geologist and amateur ornithologist
Stephen Marchant (actor), Irish actor
Todd Marchant (born 1973), American ice hockey player
Tony Marchant (playwright) (born 1959), British playwright and television dramatist
Willim "Frenchie" Marchant, Northern Irish loyalist and Ulster Volunteer Force member
