Pasir Mas District is a district (jajahan) in Kelantan, Malaysia. The district covers an area of 614.15 square kilometers and is bordered by the districts of Tumpat District to the north, Tanah Merah District to the south, Kota Bharu District to the east, and the Thai district of Su-ngai Kolok (Malay: Sungai Golok) to the west. Due to its geographical location, it acts as the main gateway of the East Coast of Malaysia to Thailand and is also traversed by major road transport routes from the West Coast to the state capital of Kota Bharu.