The Nakhon Si Thammarat Range (Thai: ทิวเขานครศรีธรรมราช, RTGS: Thio Khao Nakhon Si Thammarat, [tʰīw kʰǎw ná(ʔ).kʰɔ̄ːn sǐː tʰām.mā.râːt]) is a mountain range on the Malay peninsula in southern Thailand, running in a north–south direction. This mountain chain is also sometimes named Banthat Range (ทิวเขาบรรทัด), a name which is however also used to refer to the Chanthaburi mountain range.