| Official Name: | Fuentesaúco |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain. |
| Leader Title: | Mayor |
| Leader Name: | Jaime Vega González |
| Area Total Km2: | 67.85 |
| Population Demonym: | Saucanos |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Coordinates: | 41.2314°N -5.4931°W |
Fuentesaúco is a municipality located in the province of Zamora, Castile and León, Spain.