Ao Yai (, ) is a tambon (subdistrict) of Wang Wiset District, in Trang province, Thailand. In 2026, it had a population of 3,578 people.

History Before the tambon was called Ao Yai, it was called Ao Yuan, but later changed because the name is not suitable for the locals in nearby areas. The name Ao Yai is from the shore that became a bay by the waves.

Administration Central administration The tambon is divided into six administrative villages (mubans). No. Name Thai PopulationPhu Yai Ban1.Ao Yaiอ่าวใหญ่988Lave Rattanawan2.Ao Chorอ่าวช่อ853Sathit Huangnam3.Laem Yaแหลมหญ้า371Chuchart Haokamnert4.Laem Phraoแหลมพร้าว439Wichit Kamhan5.Ao Khamอ่าวขาม530Manit Chaichili6.Laem Sokแหลมศอก397Tavi Rongsirikhun

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