| Official Name: | Waeng Noi |
| Native Name: | แวงน้อย |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Khon Kaen |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Waeng Noi |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 42408 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 40230 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 4014 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.8036°N 102.4158°W |
Waeng Noi (th|แวงน้อย, pronounced as /th/; tts|แวงน้อย, in Lao pronounced as /wɛ᷇ːŋ nɔ̂ːj/) is a district (amphoe) in the southwestern part of Khon Kaen province, northeastern Thailand.
Neighboring districts are (from the north clockwise): Waeng Yai and Phon of Khon Kaen Province; Bua Lai, Bua Yai, and Kaeng Sanam Nang of Nakhon Ratchasima province; and Khon Sawan of Chaiyaphum province.
The minor district (king amphoe) was created on 1 June 1971, when six tambons were split off from Phon district.[1] It was upgraded to a full district on 21 August 1975.[2]
The district is divided into six subdistricts (tambons), which are further subdivided into 73 villages (mubans). Waeng Noi is a township (thesaban tambon) which covers parts of tambon Waeng Noi. There are a further six tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Waeng Noi | แวงน้อย | 13 | 9,826 | ||
| 2. | Kan Lueang | ก้านเหลือง | 14 | 9,343 | ||
| 3. | Tha Nang Naeo | ท่านางแนว | 10 | 4,884 | ||
| 4. | Lahan Na | ละหานนา | 15 | 7,589 | ||
| 5. | Tha Wat | ท่าวัด | 10 | 5,712 | ||
| 6. | Thang Khwang | ทางขวาง | 11 | 5,054 |