Teknaf (Bengali: টেকনাফ Ṭeknaf) is an Upazila of Cox's Bazar District in the Division of Chittagong, Bangladesh. It forms the southernmost point in mainland Bangladesh (St. Martin Island is the southernmost point). The name of the region comes from the Naf River which forms the Eastern boundary of the upazila.
The tidal range at the Teknaf coastal area is strong influenced Naaf river estuary. The area is blessed with a warm tropical climate and sufficient rainfall which enable to support a wide biological diversity.
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 sub-district 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 90 km far away from Cox's Bazar and well connected with various kinds transportation services.
Teknaf Peninsula is one of the longest sandy beach ecosystems (80 km) in the world. It represents a transitional ground for the fauna of the Indo-Himalayan and Indo-Malayan ecological sub-regions. Important habitats at the site include mangrove, mudflats, beaches and sand dunes, canals and lagoons and marine habitat. Mangrove forest occurs in Teknaf peninsula both as natural forest with planted stands and mostly distributed in the intertidal zone.
It is located 84 km from Coxs Bazaar at the southernmost tip of Bangladesh on the Naaf river with a beautiful beach at shahpari dwip Shah Pari Island.