| Castaños | |
| Image Alt: | A sign depicting the city name of Castaños. Each letter is a different color. The black text under the letters reads as "la puerta al norte de coahuila", which roughly translates to "the door to the north of Coahuila" |
| Settlement Type: | City |
| Mapsize: | 300px |
| Pushpin Map: | Mexico |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Mexico |
| Subdivision Type: | Country |
| Subdivision Name: |  Mexico |
| Subdivision Type1: | State |
| Subdivision Name1: | Coahuila |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Castaños |
| Population As Of: | 2000 |
| Population Total: | 22,401 |
| Coordinates: | 26.7842°N -101.4328°W |
Castaños is a city in the northern Mexican state of Coahuila. It is located at 101° 25' 58" West, 26° 47' 3" North, in the state's central region (Región Centro).