Santo Lake (Italian: Lago Santo parmense) is a lake in the Province of Parma, Emilia-Romagna, Italy. At an elevation of 1,507 m, its surface area is 81,550 mò (0.0815 kmò).
The outflow is the small river Parma di Lago Santo. After about 4 km it join with Parma di Badignana and the river then takes the name of Parma.