Oneto is a surname. Notable people with the surname include:
Bettina Oneto (born 1957), Peruvian actress and comedian Carlos Oneto (1929–2014), Peruvian actor, television personality and comedian, father of Bettina Luca Oneto (born 1996), Italian footballer Marco Oneto (born 1982), Chilean handball player Pepe Oneto (1942–2019), Spanish journalist Tomás Oneto (born 1998), Argentine footballer Vanina Oneto (born 1973), Argentine field hockey player