1870 in Argentina

Events in the year 1870 in Argentina.

Incumbents

 * President: Domingo Faustino Sarmiento
 * Vice President: Adolfo Alsina

Governors

 * Buenos Aires Province: Emilio de Castro y Rocha
 * Cordoba: Félix de la Peña
 * Mendoza Province: Nicolás Villanueva (until 16 October); Arístides Villanueva (from 16 October)
 * Santa Fe Province: Mariano Cabal

Vice Governors

 * Buenos Aires Province: vacant

Events

 * 1 March - End of the Paraguayan War. Following this, Argentina seeks to enforce one of the secret clauses of the Treaty of the Triple Alliance, which would have permitted it to annex a large portion of the Gran Chaco region.  The Brazilian government, wishing to maintain Paraguay as a buffer with Argentina, it rejects the Argentine proposal.

Births

 * 21 February – Victor Mercante, educationist (died 1934)

Deaths

 * 12 March – Pastor Obligado, lawyer, Governor of the secessionist State of Buenos Aires 1853–1858 (born 1818)
 * 11 April – Justo José de Urquiza, politician and general (born 1801)