| Official Name: | Mambrilla de Castrejón |
| Settlement Type: | Municipality and town |
| Postal Code: | 09317 |
| Area Total Km2: | 16 |
| Elevation M: | 838 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Website: | http://www.mambrilladecastrejon.es/ |
Mambrilla de Castrejón is a municipality located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 138 inhabitants.