It comes from the two areas where it is produced - the provinces of Parma and Reggio (Parmigiano is the Italian adjective for Parma and Reggiano for Reggio Emilia).
In addition to Parma and Reggio Emilia, the cheese is also produced in parts of Bologna, west of the Reno River, and in Modena (both in the Emilia-Romagna region), as well as in parts of Mantua (Lombardy), which is on the south bank of the Po River.
