Gerolamo Ragazzoni or Gerolamo Regazzoni was a Roman Catholic prelate who served as Bishop of Bergamo (1577–1592),
Apostolic Nuncio to France (1583–1586),
Bishop of Novara (1576–1577),
Apostolic Administrator of Kisamos (1572–1576),
Coadjutor Bishop of Famagusta (1561),
and Titular Bishop of Nazianzus (1561).