Delfim Moreira da Costa Ribeiro (; 7 November 1868 – 1 July 1920) was a Brazilian politician. He was born in Minas Gerais state, and was elected vice-president in 1918. He assumed the presidency on November 15, 1918, due to the illness and death of former (1902–1906) and now President-Elect Rodrigues Alves. However, Moreira suffered from psychological problems, and left his duties to the ministers. Following the constitution, he called elections in 1919 and returned to the vice-presidency until his death. He was born to a Portuguese father and to a Portuguese Brazilian mother who traced her ancestry back to the early settlers of Brazil.
| Political offices | ||
|---|---|---|
| Preceded by Venceslau Brás |
President of Brazil 1918–1919 |
Succeeded by Epitácio Pessoa |
| Preceded by Urbano Santos da Costa Araújo |
Vice-President of Brazil 1918–1920 |
Succeeded by Bueno de Paiva |
| Government offices | ||
| Preceded by Júlio Bueno Brandão |
President of Minas Gerais 1914–1918 |
Succeeded by Artur da Silva Bernardes |