Castel San Pietro (disambiguation)
Castel San Pietro is a municipality in the canton of Ticino, Switzerland. Castel San Pietro may also refer to:

 Castel San Pietro Terme, city and comune in the Metropolitan City of Bologna, Emilia-Romagna, Italy
 Castel San Pietro Romano, municipality in the Metropolitan City of Rome in the Italian region of Latium, Italy

See also 

 San Pietro (disambiguation)