Pasir Mas (Jawi: ڤاسير مس, Chinese: 巴西馬, Kelantanese: Pasey Mah) is a town in Pasir Mas District, in north-western Kelantan, Malaysia. Pasir Mas was once the second biggest city in the state until the early 1990s when it was overtaken by Tanah Merah. The town is blocked from expanding to the east by the Kelantan River. To the north, the railway line splits the town - further limiting land suitable and desirable for commercial real estate development. Haphazard development over the past decades has resulted in the mushrooming of residential houses that encircle the town. This makes potential land acquisition for commercial development a complex and costly exercise. A new township is slowly taking shape about four miles away at the Mukim of Lubuk Jong - a previously swampy area along the road leading to Rantau Panjang.
