Fettes may refer to:
Fettes College, a private school in Edinburgh, Scotland , a German hip-hop group Fettesian-Lorettonian Club, Sports Club
People with the surname Christopher Fettes (born 1937), English-born Irish teacher and social activist Ian Dundas Fettes (1945-2025), NZ-born genealogist William Fettes (1750-1836), Sir William Fettes, First Baronet, Scottish businessman and philanthropist
See also Vettese, another variant of the name Fiddes