Treacher is an English surname; notable Treachers include: Arthur Treacher (1894–1975), English actor Bill Treacher (1930–2022), English actor George Treacher (–1908), British architect Sir John Treacher (1924–2018), British admiral Sir William Treacher (1849–1919), British colonial administrator
See also Arthur Treacher's, an American seafood restaurant chain Treacher–Collins syndrome, a genetic disorder Treacher Methodist Girls' School in Taiping, Malaysia