Mariano Arrate Esnaola (August 12, 1892 – December 24, 1963) was a Spanish football (soccer) player who competed in the 1920 Summer Olympics.
He was born and died in San Sebastián.He was a member of the Spanish team, which won the silver medal in the football tournament.
He played for Luchana (1908-1909), San Sebastián (Real Sociedad B) (1909-1911) and Real Sociedad (1911-1924).