Óscar Únzaga de la Vega (19 April 1916 – 19 April 1959) was a Bolivian political figure and rebel. Most significantly, he founded the Bolivian Socialist Falange (FSB) movement in 1937, and ran for President in the 1956 elections, when his party became the main opposition movement to the Movimiento Nacionalista Revolucionario (MNR).