L'Hospitalet de Llobregat (Catalan pronunciation: [luspitəˈlɛd də ʎuβɾəˈɣat; ˌlɔs-]; Spanish: Hospitalet de Llobregat), often shortened to L'Hospitalet or just L'H, is a city and municipality in the autonomous community of Catalonia in Spain. It is part of the Barcelona metropolitan area, the Barcelona province, the Barcelonès comarca and of the Barcelona conurbation. With a population of 282,299 as of 2024, it is the 15th-largest city in Spain and the 2nd-largest city in Catalonia.
By population, it is the second largest municipality in Catalonia and the sixteenth in Spain. It is one of the most densely populated cities in the European Union.