Teknaf is an Upazila of Cox's Bazar District in the Division of Chittagong, Bangladesh. It forms the southernmost point in mainland Bangladesh (St. Martin's Island is the southernmost point). The name of the region comes from the Naf River which forms the Eastern boundary of the upazila.
Teknaf is the most southern or south-eastern coastal subdistrict under the Cox's Bazar district of Bangladesh. This is the only place Bangladesh which is connected with Myanmar (former Burma) by a small river called Naf River of Bangladesh. Because of its geographical location this subdistrict has developed as most interesting place for the foreign and local tourists. Because of tropical weather of Bangladesh most tourists usually go to visit this place during winter or in between winter and autumn (October to March). It is about 100 km far away from Cox's Bazar and well connected with various kinds of luxurious bus services.