Hat Yai Junction is an international railway junction and a Class 1 railway station for the State Railway of Thailand in the center of Hat Yai City, Songkhla Province. The station is located 928.585 km (577.0 mi) from Bangkok's Thon Buri railway station and serves as a junction for the mainline Southern Line towards Pattani, Yala and Sungai Kolok (border point with Malaysia at Rantau Panjang) and Padang Besar, Kuala Lumpur and Singapore Line (border point with Malaysia at Padang Besar). The station yard is the location of a large locomotive depot: Hat Yai Depot, the southernmost railway depot in Thailand.
Hat Yai Junction encouraged Hat Yai's economic boom and growth, making the city larger than the province's capital Songkhla.