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.

The district is divided into seven sub-districts (tambons), which are further subdivided into 70 villages (mubans). There are three townships (thesaban tambon): Pathio covers parts of tambons Bang Son and Thale Sap, Map Ammarit parts of tambon Don Yang, Sa Phli parts of the same-named tambon. There are a further seven tambon administrative organizations (TAO).

No. Name Thai name Villages Pop. 1. Bang Son บางสน 8 4,184 2. Thale Sap ทะเลทรัพย์ 7 5,098 3. Saphli สะพลี 10 7,669 4. Chum Kho ชุมโค 14 9,547 5. Don Yang ดอนยาง 15 9,047 6. Pak Khlong ปากคลอง 7 4,321 7. Khao Chai Rat เขาไชยราช 9 4,527

• amphoe.com