José Isaías de Noronha (6 June 1873 – 29 January 1963) was a Brazilian Navy Admiral who briefly served as president of Brazil while being a member of the provisional military junta of 1930.

When the junta acquiesced to revolutionaries, Noronha initially remained as minister of the Navy in the administration of President Getúlio Vargas.

While serving as a midshipman, the Naval Revolts broke out in September 1893 against President Floriano Peixoto, but Noronha did not participate in them.

After his uncle left office in November, Noronha served as an artillery instructor on the battleship Riachuelo.

In 1910, he was interim commander of the destroyer Piauí, during which the Revolt of the Lash broke out and Noronha received orders to prepare his ship for combat against the insurgents, though this never happened.

[1][2][4] After commanding Piauí, Noronha headed the Directorate of Lighthouses of the Superintendence of Navigation from January to October 1911.

He left to command the destroyer Sergipe, which, in February 1912, was positioned near Asunción to defend it from rebels amid instability in Paraguay.

From November 1917 to February 1919, he directed the Grumetes School until he was promoted to captain at sea, when he took command of the battleship Minas Geraes in March.

Noronha also assumed the position of minister of the Navy beginning 25 October, succeeding Arnaldo de Siqueira Pinto da Luz [pt].

The junta, among other measures, began to demilitarize Brazil, authorized banking operations to resume, and opened a line of credit to attack yellow fever.

After the junta proposed that hostilities be suspended, revolutionaries in Ponta Grossa continued to advance towards Rio de Janeiro.