1621 in Spain

Events in the year 1621 in Spain.

Incumbents

 * Monarch: Philip III until March 31, Philip IV since March 31

Events

 * August 10 - Eighty Years' War: Battle of Gibraltar (1621)
 * September 5 - Thirty Years' War: beginning of the Siege of Jülich

Deaths

 * March 31 - Philip III (born 1578)