Gonzalo O'Farrill y Herrera (1754 in La Habana, Cuba – 1831 in Paris) was a Spanish soldier and politician.
He was born in Cuba as the son of O'Farrill y Arriola of Irish descent.
In Spain, Gonzalo became (at the time of King Carlos IV of Spain), a lieutenant general of the Royal Spanish Army, Director of the Military College at Puerto de Santa MarĂa, Cadiz, Spain, and a Plenipotentiary Minister representing Spain in the Kingdom of Prussia under King Frederic.
He remained Minister of War under Bonaparte.
After the collapse of French power in Spain, he emigrated to France and had all his properties in Cuba confiscated.
He died in 1831 and is buried in the Père Lachaise Cemetery.
He had married a widow, Ana RodrĂguez de Carassa who already had a child, Pedro Miguel Saenz de SantamarĂa.