João Maria Ferreira do Amaral, OTS, CC (14 June 1876 in Lisbon, São Julião – 11 March 1931 in Lisbon) was a Portuguese soldier.
He was a natural son of Francisco Joaquim Ferreira do Amaral by Augusta Frederica Smith Chaves.
He was a Colonel of Infantry of the Portuguese Army, Commander of the Polícia de Segurança Pública, Officer of the Order of the Tower and Sword with Palm, Commander of the Order of Christ with Palm and Commander of the Legion of Honour, Croix de Guerre, etc., who fought in World War I.
He married Maria Emília Carolina Tavares de Almeida Arez (Nova Goa, Goa, India, 3 May 1872 - 1923), daughter of José Joaquim Fernandes Arez, Engineer, and wife Dionísia Maria Tavares de Almeida, and widow of Mateus José Lapa Valente do Couto (Oeiras, 1861–1904), married Pangim, 12 February 1887, with one son, and had an only daughter: