Hermes Rodrigues da Fonseca was a Brazilian field marshal and politician who served as President of Brazil between 1910 and 1914. He was a nephew of Marshal Deodoro da Fonseca, 1st President of Brazil, General João Severiano da Fonseca, Patron of the Army Health Service, and the son of Marshal Hermes Ernesto da Fonseca and Rita Rodrigues Barbosa.