The Babeş-Bolyai University (Romanian: Universitatea Babeş-Bolyai [′babeƪ ′bojɒ.i], commonly known as UBB) is a public research university located in Cluj-Napoca, Romania. It was created from a 1959 merger of Bolyai University (founded in 1945) and Victor Babeş University (founded in 1919), whose histories can be traced to the Jesuit Academy of Kolozsvár, founded in 1581. It occupies the first position in the University Metaranking, initiated by the Romanian Ministry of Education and Research in 2016.

Babeş-Bolyai University is the largest Romanian university with about 50,000 students. It offers study programmes in Romanian, Hungarian, German, English, and French (as well as a smaller number of programmes at the Master's level taught in Spanish, Italian, and Japanese). The university was named, following the fusion in 1959 of the Romanian and Hungarian-language universities in Cluj, after two prominent scientists from Transylvania, the Romanian bacteriologist Victor Babeş and the Hungarian mathematician János Bolyai. It is one of the five members of the Universitaria Consortium , a group of elite Romanian universities, including 

University Alexandru Ioan Cuza, 

University of Bucharest,

the Academy of Study Economics,

and University of the West Timisoara.

UBB is affiliated with the International Association of Universities, Guild of European Research-Intensive Universities, Eutopia, the Santander Group, the Agence universitaire de la Francophonie and the European University Association. Likewise, UBB signed the Magna Charta Universitatum and concluded partnerships with 210 universities in 50 countries, and it is widely considered one of the most prestigious in Eastern Europe. The BabeÈ™-Bolyai University is classified as an advanced research and education university by the Ministry of Education.