Manuel Ignacio de Vivanco Iturralde (15 June 1806 – 16 September 1873[1]) was a Peruvian politician and military leader who served as the President of Peru from 1843 to 1844.

He led part of the Peruvian forces in the campaign against the reunification of Peru-Bolivian Confederacy.

In 1843, he rebelled against Juan Francisco de Vidal, but was defeated and fled to Bolivia.

He returned to Peru then and subsequently became president in 1843 under the title "Supreme Director of the Republic".

In the name of president Juan Antonio Pezet he signed the Vivanco–Pareja Treaty on 27 January 1865, which was one cause of the Chincha Islands War.