Vice President Victorino de la Plaza Succeeded by Victorino de la Plaza Party National Autonomist Party | Preceded by José Figueroa Alcorta Nationality Argentina | |
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Born March 19, 1851
Buenos Aires ( 1851-03-19 ) Political party National Autonomist Party Spouse(s) Rosa Isidora González Delgado Died 9 August 1914, Buenos Aires, Argentina Presidential term 12 October 1910 – 9 August 1914 Previous office President of Argentina (1910–1914) Parents Luis Sáenz Peña, Cripiana Lahitie Similar Luis Sáenz Peña, Hipólito Yrigoyen, Victorino de la Plaza, José Figueroa Alcorta, Miguel Ángel Juárez C |
Roque Sáenz Peña Lahitte (March 19, 1851 – August 9, 1914) was President of Argentina from 12 October 1910 to 9 August 1914, when he died in office. He was the son of former President Luis Sáenz Peña.

He was responsible for passing Law 8871, known as "Sáenz Peña Law", which greatly reformed the Argentine electoral system, making the vote secret, universal and compulsory for males over 18. This effectively ended the rule by electoral fraud of the conservative Argentine oligarchy, and paved the way for the rise of the Radical Civic Union in the first free elections of the country. President Roque Sáenz Peña Avenue in Buenos Aires is named after him.

He also served in the War of the Pacific as a lieutenant colonel of the Peruvian Army, and was made prisoner by Chile for six months following the Battle of Arica. He later served as Ambassador to Spain (1906–1907) and Italy (1907–1910)

His daughter married Carlos Saavedra Lamas, academic and politician, and the first Latin American Nobel Peace Prize recipient.

