| Official Name: | Gajanejos, Spain |
| Pushpin Map: | Spain Province of Guadalajara#Spain Castilla-La Mancha#Spain |
| Subdivision Name3: | Gajanejos |
| Area Total Km2: | 25 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Gajanejos is a municipality located in the province of Guadalajara, Castile-La Mancha, Spain. According to the 2004 census (INE), the municipality has a population of 68 inhabitants.