Fiorenzuola d'Arda (; , <small>or</small> ) is a city and comune in Italy in the province of Piacenza, part of the Emilia-Romagna region. Its name derives from Florentia ("prosperous" in Latin). The "d'Arda" portion refers to the River Arda which flows from the Apennines into the valley where Fiorenzuola is situated. Fiorenzuola's origins are old, dating from the first prehistorical human settlements in Italy.
Fiorenzuola d'Arda was one of the main centers of the area during the Middle Ages. Under the Duchy of Parma and Piacenza it was a "middle county" independent from both parties.
The town is represented by Serie C football club US Fiorenzuola. The annual Six Days of Fiorenzuola, a six-day track cycling race, has taken place in Fiorenzuola since 1998.