| Castaños | |
| Settlement Type: | Municipality |
| Mapsize: | 180px |
| Subdivision Type: | Country |
| Subdivision Name: |  Mexico |
| Subdivision Type1: | State |
| Established Title: | Founded |
| Established Date: | 1877 |
| Named For: | Gaspar Castaño de Sosa |
| Seat Type: | Seat |
| Seat: | Castaños |
| Seat1 Type: | Largest city |
| Seat1: | Castaños |
| Area Total Km2: | 7860 |
| Population As Of: | 2005 |
| Population Total: | 23,871 |
| Coordinates: | 26.7842°N -101.4328°W |
Castaños is one of the 38 municipalities of Coahuila, in north-eastern Mexico. The municipal seat lies at Castaños. The municipality covers an area of 7860 km².
As of 2005, the municipality had a total population of 23,871.[1]