Sabhal Mór Ostaig is two miles north of Armadale, at the south end of Skye.
The college is on Sheet 32 of the OS Landrover series of maps and on Sheet 412 of the Explorer series. It is on two campuses which are about 500m apart. The old campus is called Àrainn Ostaig and the new Campus is called Àrainn Chalum Chille.
| OSGB | |||||
| Campus | Latitude | Longitude | Grid Reference | Easting | Northing |
| Àrainn Ostaig | 57.0862° | -5.8805° | NG 650 062 | 164978 | 806155 |
| Àrainn Chaluim Chille | 57.0870° | -5.8718° | NG 655 062 | 165510 | 806214 |