Tortosa is the capital of the comarca of Baix Ebre, in Catalonia, Spain.
Tortosa is located at 12 metres above sea level, by the Ebro river, protected on its northern side by the mountains of the Cardó Massif, of which Buinaca, one of the highest peaks, is located within Tortosa's municipal boundary.
Before Tortosa, across the river, rise the massive Ports de Tortosa-Beseit mountains. The area around Mont Caro and other high summits are often covered with snow in the winter.