Yang Yai (Thai: ยางใหญ่) is a tambon (subdistrict) located in the northern region of Nam Yuen district, in Ubon Ratchathani Province, Thailand.

[2][5] As of the 2021 consensus, it had a population of 6,280 people and 1,857 households in 12 administrative villages (Muban; บ้าน or หมู่บ้าน).

[10] However, it later became an independent tambon in 1988 by absorbing five other villages in the northern region of Bu Pueai.

[2] The tambon covers 46 km2 and is located in the northern region of the Nam Yuen district, on Lam Dom Yai River's basin.

[2] The subdistrict of Yang Yai is subdivided into 12 administrative villages (mubans; หมู่บ้าน).