He served three times as Spanish prime minister: from 27 October 1913 to 9 December 1915, from 11 June 1917 to 3 November 1917, and from 28 April 1920 until his assassination by Catalan anarchists.

Born in A Coruña, Spain, son of Carlos Dato y Granados (himself the son of Carlos Dato Camacho y Marín and wife Cayetana Ruperta Granados y García, de Vivancos e Acosta) and wife Rosa Lorenza Iradier e Arce, of Galician descent.

On 8 March 1921 in Madrid, while being driven from the parliament building and in front of the Puerta de Alcalá, Dato was assassinated by three Catalan anarchists, Luis Nicolau, Pedro Mateu, and Ramón Casanellas, who were riding a motorcycle.

His assassination came amid rising unrest between trade unions, particularly the Confederación Nacional del Trabajo, and the government.

[3] King Alfonso XIII of Spain posthumously made him a duke by bestowing the title "Duchess of Dato" on his widow.