| Official Name: | San Martín de Valderaduey |
| Subdivision Name3: | San Martín de Valderaduey |
| Area Total Km2: | 23 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
San Martín de Valderaduey is a municipality located in the Sanabria comarca, province of Zamora, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 86 inhabitants. The town's main church is from the 10th century.