| Rejas | |
| Settlement Type: | City neighborhood |
| Area Total Km2: | 5.01573218 |
| Population Total: | 15775 |
| Population As Of: | 2017 |
| Population Density Km2: | auto |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Aut. community |
| Subdivision Name1: | Community of Madrid |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Madrid |
| Subdivision Type3: | District |
| Subdivision Name3: | San Blas-Canillejas |
Rejas is an administrative neighborhood (barrio) of Madrid belonging to the district of San Blas-Canillejas.