Mount Jerai (Malay: Gunung Jerai;) or formerly Kedah Peak is the highest mountain in the Malaysian state of Kedah with the height of 1,217 m (3,993 ft). Years before Melaka became a central trading hub, the Indian and Arab merchants preferred Kedah as it is geographically positioned on the same latitude as Southern India

The mountain is a massive limestone outcrop and is a lone feature from the surrounding geography of the area. There is an information board on top of the mountain stating that it used to be an island called Pulai Serai before the sea levels receded letting it form a mountain, but this fact has no research or historical basis.

In ancient times, the height of the mountain relative to its surrounding allowed traders to use the mountain as a navigational point. Bujang Valley, the richest archaeological site in Malaysia is located on the southern reaches of the mountain.