| Official Name: | Castrillo de la Valduerna |
| Native Name Lang: | ast |
| Pushpin Map: | Spain |
| Coordinates: | 42.3242°N -6.1347°W |
| Subdivision Name3: | Castrillo de la Valduerna |
| Leader Title: | Mayor |
| Leader Name: | Elvira Flórez López |
| Leader Party: | PP |
| Area Total Km2: | 23.51 |
| Elevation M: | 904 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal Code |
| Postal Code: | 24721 |
| Area Code Type: | Telephone prefix |
| Area Code: | 987 |
Castrillo de la Valduerna (pronounced as /es/), is a municipality located in the province of León, Castile and León, Spain. According to the 2010 census (INE), the municipality has a population of 190 inhabitants.