Jacobus Balduinus
File:Balduinus, Iacobus – Quaestiones, 14th-century – BEIC 10069997.jpg
Quaestiones, 14th-century manuscript. Città del Vaticano, Biblioteca Apostolica Vaticana, Fondo Vaticano latino, Vat. lat. 2301, ff. 13r-v, 20v.
Jacobus Balduinus (about 1175 – 10 April 1235<ref name="DBI">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>) was an Italian jurist.
Balduinus was born in Bologna probably about 1175,<ref name="DBI" /> and is reputed to have been of a noble family. He was a pupil of Azo, and the master of Odofredus, of the canonist Hostiensis (Henricus de Segusio), and of Jacobus de Ravanis (Jacques de Revigny), who taught at Orléans. His great fame as a professor of civil law at the University of Bologna caused Balduinus to be elected podestà of the city of Genoa, where he was entrusted with the reforms of the law of the Genoese Republic. He died at Bologna in 1235,<ref name="DBI" /> and has left behind him some treatises on procedure.