Marciano José Pereira Ribeiro (died 4 March 1840) was a Brazilian doctor and politician.
[1] Originally from Minas Gerais, Ribeiro graduated from medicine in Edinburgh.
[4] He was the third vice president of Rio Grande do Sul when the Ragamuffin War commenced and the rebels, dubbed the farrapos, took the capital Porto Alegre.
[5] During this time period, he had João Manuel de Lima e Silva as an advisor to the Commander of Arms provincial office.
[2][8] He escaped in 1840 and found his way back to Rio Grande do Sul, and to São Gabriel in particular, but by then his health had largely deteriorated.