| Official Name: | Castellar |
| Pushpin Map: | Spain Province of Jaén#Spain Andalusia#Spain |
| Pushpin Label: | Castellar, Jaén |
| Pushpin Map Caption: | Location in the Province of Jaén |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Jaén |
| Area Total Km2: | 155.48 |
| Elevation M: | 760 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Website: | http://www.castellar.es/ |
Castellar (formerly known Castellar de Santiesteban) is a municipality in the province of Jaén, in the autonomous community of Andalusia, Spain.