| Official Name: | Santa Eufemia del Arroyo |
| Subdivision Name3: | Santa Eufemia del Arroyo |
| Area Total Km2: | 24 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Santa Eufemia del Arroyo is a municipality located in the province of Valladolid, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 144 inhabitants.