Biagio Brugi (1855 – 1934) was an Italian jurist. He taught Roman law at Catania (1882), Padua (1885) and Pisa (1918–30). He was a student of Filippo Serafini.
His works underline the relevance of Roman law for contemporary jurisprudence. His influential 1891 textbook Introduzione enciclopedica alle scienze giuridiche e sociali nel sistema della giurisprudenza emphasised the importance of research in the political and social sciences for the study of law.
Brugi was a member of the Accademia dei Lincei, the Istituto Veneto and of several foreign academies, as well as government commissions. 1928 he was made a senator for life.