| Official Name: | Na Chaluai |
| Native Name: | นาจะหลวย |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ubon Ratchathani |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Na Chaluai |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 53774 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 34280 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 3408 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.5214°N 105.2461°W |
Na Chaluai (Thai: นาจะหลวย, in Thai pronounced as /nāː tɕā.lǔaj/; นาจะหลวย, in Lao pronounced as /na᷇ː tɕā.lǔaj/) is a district (amphoe) in the southern part of Ubon Ratchathani province, northeastern Thailand.
The Ministry of Interior created the "minor district" (king amphoe) Na Chaluai on 1 February 1972, when the three tambons (sub-districts) Na Chaluai, Phon Sawan, and Non Sombun were split off from Det Udom district.[1] The sub-district was later upgraded to a full district on 12 April 1977.[2]
More than 80 percent of Na Chaluai's people moved there from other districts. This area was a battle field of Communist Party of Thailand and the Royal Thai Army during the time of Vietnam War.
Neighboring districts are (from the west clockwise) Nam Yuen, Det Udom, Buntharik and the Laotian province of Champasak.
Phu Chong-Na Yoi National Park is in the district. The important water resource is the Dom Yai river.
The district is divided into six sub-districts (tambons), which are further subdivided into 68 villages (mubans). Na Chaluai is a township (thesaban tambon) which covers parts of tambon Na Chaluai. There are a further six tambon administrative organizations.
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Na Chaluai | นาจะหลวย | 16 | 17,057 | ||
| 2. | Non Sombun | โนนสมบูรณ์ | 9 | 6,600 | ||
| 3. | Phon Sawan | พรสวรรค์ | 10 | 5,440 | ||
| 4. | Ban Tum | บ้านตูม | 14 | 11,998 | ||
| 5. | Sok Saeng | โสกแสง | 10 | 7,251 | ||
| 6. | Non Sawan | โนนสวรรค์ | 9 | 5,428 |