Hermes Rodrigues da Fonseca (São Gabriel), (12 May 1855) - Petrópolis, ( 9 September 1923 ) was a brazilian military and political, president of Brazil between 1910 and 1914.
Nephew of Marshal Deodoro da Fonseca, 1st President of Brazil, General João Severiano da Fonseca, Patron of the Army Health Service, and son of Marshal Hermes Ernesto da Fonseca and Rita Rodrigues Barbosa.