Waeng Yai (Thai: แวงใหญ่, pronounced [wɛ̄ːŋ jàj], Northeastern Thai: แวงใหญ่ pronounced [wɛ̂ːŋ ɲāj]) is a district (amphoe) of Khon Kaen province, northeastern Thailand.

Neighboring districts are (from the north clockwise): Khok Pho Chai, Chonnabot, Phon, and Waeng Noi of Khon Kaen Province; Khon Sawan of Chaiyaphum province.

The minor district (king amphoe) Waeng Yai was established on 3 January 1977, when the three tambons Khon Chim, Non Thong, and Mai Na Phiang were split off from Phon district.

[2] The district is divided into five subdistricts (tambons), which are further subdivided into 50 villages (mubans).

This Khon Kaen Province location article is a stub.