San Costanzo

San Costanzo is a comune (municipality) in the Province of Pesaro e Urbino in the Italian region Marche, located about 40 km northwest of Ancona and about 20 km southeast of Pesaro.

Geography
The municipality of San Costanzo contains three frazioni (subdivisions, mainly villages and hamlets) Cerasa, Solfanuccio, and Stacciola. A minor portion of Marotta belongs to the municipality.

San Costanzo borders the following municipalities: Fano, Mondolfo, Monte Porzio, Monterado, Terre Roveresche.