Alexander de Tartagnis (c. 1424 – 1477) was an Italian jurist. After completing his studies in Bologna, he became an assessor at the and taught law in Bologna, Ferrara and Padua. His work includes commentaries on select parts of the Pandects and on other works, as well as more than 1200 advisory opinions. He reports that, for humanitarian reasons, he did not issue advisory opinions in the disfavour of the accused in criminal cases. Paulus Castrensis was one of his teachers. Jason de Mayno, , and were three of his students.