| Official Name: | Montemayor de Pililla, Spain |
| Flag Size: | 190px |
| Subdivision Name3: | Montemayor de Pililla |
| Leader Title: | Alcalde |
| Leader Name: | Francisco Javier Martín Sanz (2011) (IU) |
| Area Total Km2: | 59.24 |
| Elevation M: | 869 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Coordinates: | 41.5099°N -4.4572°W |
Montemayor de Pililla 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 1,036 inhabitants.
From 14 to 18 September, the Exultation of the Holy Cross is held with traditional festivities such as bull fights, music and dancing.
There is also a feastday on 22 July, as it is the day of Montemayor de Pililla's patron saint, Mary Magdalene.