| Official Name: | Non Sa-at |
| Native Name: | โนนสะอาด |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Udon Thani |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Non Sa-at |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 45543 |
| Population As Of: | 2017 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 41240 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 4105 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 16.9783°N 102.8933°W |
Non Sa-at (Thai: โนนสะอาด, in Thai pronounced as /nōːn sāʔàːt/) is a district (amphoe) in the southern part of Udon Thani province, northeastern Thailand.
Neighboring districts are (from the north clockwise) Nong Saeng and Kumphawapi of Udon Thani Province, Kranuan, Nam Phong, and Khao Suan Kwang of Khon Kaen province.
The minor district (king amphoe) was established on 21 January 1974, when the three tambons, Non Sa-at, Pho Si Samran, and Bung Kaeo, were split off from Kumphawapi district.[1] It was upgraded to a full district on 12 April 1977.[2]
The district is divided into six sub-districts (tambons), which are further subdivided into 63 villages (mubans). Non Sa-at is a township (thesaban tambon) which covers parts of tambon Non Sa-at. There are a further six tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Non Sa-at | โนนสะอาด | 9 | 8,666 | ||
| 2. | Bung Kaeo | บุ่งแก้ว | 12 | 10,746 | ||
| 3. | Pho Si Samran | โพธิ์ศรีสำราญ | 9 | 8,164 | ||
| 4. | Thom Na Ngam | ทมนางาม | 10 | 7,077 | ||
| 5. | Nong Kung Si | หนองกุงศรี | 11 | 6,813 | ||
| 6. | Khok Klang | โคกกลาง | 12 | 6,993 |
Non Sa-at is a source for growing mulberries and raising sericulture to produce good quality Thai silk.