Tịnh Biên is a district-level town of An Giang province in the Mekong Delta region of Vietnam. As of 2022, the town had a population of 143,098. The town seat lies at Tịnh Biên ward. The Tịnh Biên frontier market is located here. Tịnh Biên is about 125 km from Phnom Penh along National Highway 2. It is a common route used by tourists between Cambodia and Vietnam. The Khmer population is relatively high, especially in the communes of An Cư, Tân Lợi, An Hảo, Giao Va and Vĩnh Trung.