Juan Larrea, Argentinian captain and politician (d. 1847)
Juan Larrea (June 24, 1782 – June 20, 1847) was a Spanish businessman and politician in Buenos Aires during the early nineteenth century. He headed a military unit during the second British invasion of the Río de la Plata, and worked at the Buenos Aires Cabildo. He took part in the ill-fated Mutiny of Álzaga. Larrea and Domingo Matheu were the only two Spanish-born members of the Primera Junta, the first national government of Argentina.

He supported the secretary Mariano Moreno within the Junta, and was moved to the distant city of San Juan when the Morenists were removed from government. He returned as a deputy for Córdoba in the Assembly of Year XIII constituent assembly, promoting many resolutions. Together with Carlos María de Alvear, he organized the strategy for the downfall of the royalist stronghold in Montevideo, a threat to Buenos Aires during the Argentine War of Independence. Despite the victory, he faced political conflicts with admiral William Brown and an economic crisis, and was exiled from the country.

He moved to Bordeaux, France, but returned to Buenos Aires when his exile was lifted by the Oblivion law. He served as consul for a time, but his business declined and he committed suicide on June 20, 1847. He was the last surviving member of the Primera Junta.