Vacher is a surname of the French origin. Its literal translation means a keeper of stock or cattle or a herdsman but is generally used by people whose ancestry is traced to the cow-herders. It is also used by a small group of people in India. People with the name include:
Chris Vacher (born 1951), British television news presenterGeorges Vacher de Lapouge (1854–1936), French anthropologist and theoretician of eugenics and racialismJoseph Vacher (1869–1898), French serial killer, executed by guillotineLaurent-Michel Vacher (1944–2005), French Canadian philosopher, writer, and journalistPaul Vacher (before 1936–1975), French perfumerPolly Vacher (born 1944), English aviatorSydney Vacher (fl. 1886–1890), English architectThomas Brittain Vacher (1805–1880), English lithographer, legal stationer, and printerWilliam Herbert Vacher (1826–1899), British merchant and bankerCharles Vacher, (1818–1883), painter in watercolours