托尔托萨（加泰罗尼亚语：Tortosa），是西班牙加泰罗尼亚塔拉戈纳省的一个市镇。总面积219平方公里，总人口28933人（2001年），人口密度132人/平方公里。

Tortosa (Catalan: [tuɾˈtozə], locally: [toɾˈtoza]; Spanish: [toɾˈtosa]) is the capital of the comarca of Baix Ebre, in Catalonia (Spain).

Tortosa is located at 12 metres (39 feet) above sea level, by the Ebre 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 term.