1851 in Argentina
Events in the year 1851 in Argentina.
Incumbents
- Governor of Buenos Aires Province: Juan Manuel de Rosas
- Governor of Cordoba: Manuel López
- Governor of Santa Fe Province: Pascual Echagüe then Domingo Crespo
Events
- May 1 – governors Justo José de Urquiza of Entre Rios and Benjamin Virasoro of Corrientes rise up against Rosas
- May 29 – Corrientes and Entre Rios enter into alliance with Uruguay and Empire of Brazil
- August 18 – Rosas declares war on Empire of Brazil
Births
- March 19 – Roque Sáenz Peña, President 1910–1914