Coma-ruga (Catalan pronunciation: [ˌkoməˈruɣə]; Spanish: Comarruga) is a seaside resort in the municipality of El Vendrell, in the province of Tarragona (Catalonia, Spain).

Comar-ruga is located in the eastern part of the Costa Dorada, some 55 km to the West of Barcelona-El Prat Airport, near the popular tourist resorts of Calafell and Torredembarra.

The first written reference to Coma-ruga appears in 1180, when the abbot of Sant Cugat granted to Arnau Sunyer i Berenguer the place named "ipsum vilare de Coma Ruga", near the castles of Calders and Saint Vincent.

Due to the collaboration of Italian airplanes (hydroplanes) during the Christmas holidays of 1938 (between the 25th and the 29th), Coma-ruga was heavily bombed causing dozens of casualties.

In 1892 the hot springs of the pond and small creek (riuet) of Coma-ruga were declared of public interest for its health properties by the Royal Academy of Medicine and Surgery of Barcelona [ca; es].