The hills are located between 10° 13' and 10° 31' N. and 76° 52' and 77° 23' E with a central point of: . They are south of where the Western Ghats are broken by the Palakkad Gap, which in, turn is south of the Nilgiri Hills. They border on Kerala to the Southwest and the Cardamom Hills to the southeast. The Palni Hills lies to the east.