1651 in Spain

The following are events that took place in 1651 in Spain.

Incumbents

 * Monarch: Philip IV

Events

 * July: Start of the Siege of Barcelona during the Reapers' War

Births

 * Antonio Arbiol y Díez, Franciscan and painter (d. 1726)
 * Manuel de Oms, 1st Marquis of Castelldosrius, diplomat, man of letters, Viceroy of Peru. (d. 1710)
 * Cristóbal Hernández de Quintana, baroque painter (d. 1725)
 * July 12 – Margaret Theresa of Spain, Holy Roman Empress (d. 1673)
 * December 25 - Pedro Manuel Colón de Portugal, 7th Duke of Veragua, (d. 1710)

Deaths

 * Luis Quiñones de Benavente, entremesista
 * October 17 – Hernando de Lobo Castrillo, bishop of Puerto Rico