Tanintharyi Region is an administrative region of Myanmar, covering the long narrow southern part of the country on the Kra Isthmus. It borders with the Andaman Sea to the west and with the Tenasserim Hills, beyond which lies Thailand, to the east. To the north is the Mon State. The capital of the division is Dawei (Tavoy). Other important cities are Myeik (Mergui) and Kawthaung. The division covers an area of 43,328 square kilometers.