| Serra Sant'Abbondio | |
| Official Name: | Comune di Serra Sant'Abbondio |
| Coordinates: | 43.4833°N 58°W |
| Region: | Marche |
| Province: | Pesaro e Urbino (PU) |
| Mayor: | Nadia Mollaroli |
| Area Total Km2: | 32.8 |
| Population Total: | 1114 |
| Population As Of: | 28 February 2009[1] |
| Postal Code: | 61040 |
| Area Code: | 0721 |
Serra Sant'Abbondio is a comune (municipality) in the Province of Pesaro e Urbino in the Italian region Marche, located about 60km (40miles) west of Ancona and about 50km (30miles) south of Pesaro.
It is the home of the historic hermitage of Fonte Avellana.