| Official Name: | Cantalejo |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Castile and León#Spain |
| Pushpin Map Caption: | Location in Spain. |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Cantalejo |
| Area Total Km2: | 79.43 |
| Elevation M: | 963 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Native Name: | Vilorio Sierte |
| Native Name Lang: | Gacería |
Cantalejo (Gacería: Vilorio Sierte) is a municipality located in the province of Segovia, Castile and León, Spain. According to the 2004 census (INE), the municipality had a population of 3,622 inhabitants. The dialect known as Gacería was spoken here.