1870 in Argentina

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

• 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

• Buenos Aires Province: vacant

• 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.Bareiro Saguier, Ruben; Villagra Marsal, Carlos. Testimonios de la Guerra Grande. Muerte del Mariscal López. Tomo I, Editorial Servilibro. Asuncion, Paraguay, 2007. p 90

• 21 February – Victor Mercante, educationist (died 1934)[http://www.ibe.unesco.org/publications/ThinkersPdf/mercantee.PDF UNESCO biography]

• 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)Martínez, Benjamín, Generales de Urquiza, desfile de valientes, ED. Tor, Bs. As., 1932.

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{{Years in Argentina}}

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Category:History of Argentina (1852–1880)

Category:1870s in Argentina

Category:Years of the 19th century in Argentina

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