Ulldecona, in Catalonia, is part of the province of Tarragona. The municipality covers about 127.9 km² and had 6,714 inhabitants on 1 January 2025.
Population density is about 52 per km²: a partly rural municipality, with a main town and scattered villages or developments. Of the 33 municipalities in the province of Tarragona with at least 5,000 inhabitants, it is number 24 by population.
As the crow flies it lies about 90 km south-west of Tarragona, the provincial capital. The nearest major city is Valencia, about 145 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Peñíscola (29 km).
To explore the area, use the map of neighbouring municipalities and the accommodation options in and around Ulldecona; all the municipalities in the province of Tarragona are listed on their own page.