The Capture of Valdivia (Spanish: Toma de Valdivia) was a battle in the Chilean War of Independence between Royalist forces commanded by Colonel Manuel Montoya and Fausto del Hoyo and the Patriot forces under the command of Thomas Cochrane and Jorge Beauchef, held on 3 and 4 February 1820. The battle was fought over the control of the city Valdivia and its strategic and heavily fortified harbour. In the battle Patriots gained control of the southwestern part of the Valdivian Fort System after an audacious assault aided by deception and the darkness of the night. The following day the demoralised Spanish evacuated the remaining forts, looted local Patriot property in Valdivia and withdrew to Osorno and Chilo. Thereafter, Patriot mobs looted the property of local Royalists until the Patriot army arrived to the city restoring order.

The capture of Valdivia was a major victory to the Patriots as it deprived the Spanish Empire an important naval base from where to harass or quell the Republic of Chile.

The Chilean Navy (Spanish: Armada de Chile) is the naval warfare service branch of the Chilean Armed Forces. It is under the Ministry of National Defense. Its headquarters are at Edificio Armada de Chile, Valparaiso.