| San Marcello | |
| Official Name: | Comune di San Marcello |
| Coordinates: | 43.5833°N 25°W |
| Region: | Marche |
| Province: | Ancona (AN) |
| Frazioni: | Acquasanta |
| Mayor: | Graziano Lapi |
| Area Total Km2: | 25.78 |
| Population Footnotes: | [1] |
| Population Total: | 2000 |
| Population As Of: | 31 December 2019 |
| Population Demonym: | Sammarcellesi |
| Elevation M: | 231 |
| Saint: | Pope Marcellus I |
| Day: | January 16 |
| Postal Code: | 60030 |
| Area Code: | 0731 |
San Marcello is a comune (municipality) in the Province of Ancona in the Italian region Marche, located about 25km (16miles) west of Ancona.
San Marcello borders the following municipalities: Belvedere Ostrense, Jesi, Maiolati Spontini, Monsano, Monte San Vito, Morro d'Alba.
Founded in 1234 by a community of people from Jesi, it still has a well preserved line of walls. It is interesting to visit the Renaissance Palazzo Marcelli, the parish church, the Ferrari theatre, the Saint Mary church.
The castle is surrounded by a beautiful hilly landscape particularly renown for olive trees and vineyards.