The University of Barcelona (official name in Catalan: Universitat de Barcelona; UB), formerly also known as Central University of Barcelona is a public research university located in the city of Barcelona, Catalonia, Spain. It was established in 1450. With 76,000 students, it is one of the biggest universities in Spain and has also been ranked 1st in the country in most of the 2025 rankings.

It has 106 departments and more than 5,000 full-time researchers, technicians and research assistants, most of whom work in the 243 research groups as recognized and supported by the Government of Catalonia. In 2010, the UB was awarded 175 national research grants and 17 European grants and participated in over 500 joint research projects with the business sector, generating an overall research income of 70 million euros. The work of these groups is overseen by the UB's research centres and institutes which collaborate with leading research institutions and networks in Spain and abroad. The UB is also home to three large research foundations: the Barcelona Science Park Foundation (PCB), which includes the Institute of Biomedical Research of Barcelona (IRBB); the August Pi i Sunyer Biomedical Research Institute (IDIBAPS); and the Bellvitge Institute for Biomedical Research (IDIBELL). The UB is also a degree-awarding body of the Institut Barcelona d'Estudis Internacionals (IBEI).