Constantí (Catalan pronunciation: [kunstanˈti]) is a town in the province of Tarragona and autonomous community of Catalonia, Spain.

Archbishop Espàrec de la Barca (1215) boosted its population, ordering build the castle, the first church and the city wall.

In 1642 was attacked by Marshal La Mothe that turned the people as a base of operations.

In 1649, after a siege of two days, the city fell to the troops of Juan de Garay.

During the Independence War, General Louis-Gabriel Suchet had managed from Constantí the siege of Tarragona in 1811.