Félix Paiva (21 February 1877 – 2 November 1965) was a Paraguayan politician from the Liberal Party.
His mother was Martina Paiva. He was married to Silvia Esther Heisecke, and had 6 sons, Armando, Aníbal, Raúl, Augusto César, Milcíades Adolfo and Danilo Victor. He founded the newspapers El Diario and El Orden (which would later be renamed El País). and also President of Paraguay from 15 August 1937 to 15 August 1939.
He became president after the overthrow of Rafael Franco. In his term he restored the Constitution of 1870. On 10 October 1938, the Congress of Paraguay confirmed Paiva as provisional president. He signed a peace agreement with Bolivia in 1938, which concluded the Chaco War.