Pathio (Thai: ปะทิว, pronounced [pā.tʰīw]) is a district (amphoe) in the northern part of Chumphon Province, southern Thailand. The province's main airport, Chumphon Airport is in Pathio. Pathio has alternate English spellings, Pathiu and Pathiew.
Neighboring districts are (from the south clockwise) Mueang Chumphon, Tha Sae of Chumphon Province, and Bang Saphan Noi of Prachuap Khiri Khan Province. To the east is the Gulf of Thailand. The area features numerous limestone caves and rock formations from the Mesozoic Era. The main beach of Pathio is named Ao Bo Mao, translated as 'Spring Tree Bay', Wikimapia.