| Official Name: | Mueang Mukdahan |
| Native Name: | เมืองมุกดาหาร |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: |  Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mukdahan |
| Subdivision Type2: | Seat |
| Established Title: | District established |
| Population Total: | 129351 |
| Population As Of: | 2008 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 49000 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 4901 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 16.5381°N 104.7147°W |
Mueang Mukdahan (Thai: เมืองมุกดาหาร, in Thai pronounced as /mɯ̄aŋ múk.dāː.hǎːn/; เมืองมุกดาหาร, in Lao pronounced as /mɯ᷇aŋ mùk.dāː.hǎːn/) is the capital district (amphoe mueang) of Mukdahan province, northeastern Thailand.
Neighboring districts are (from the southeast clockwise) Don Tan, Nikhom Kham Soi, Nong Sung, Khamcha-i, and Dong Luang of Mukdahan Province; That Phanom of Nakhon Phanom province; and Wan Yai of Mukdahan Province. To the east across the Mekong River is the Laotian province of Savannakhet.
The important water resource is the Mekong River.
The district dates back to the Mueang Mukdahan, which was administered by the Monthon Udon Thani.[1] In 1907 it was made a district of Nakhon Phanom province.[2] On 27 September 1982 the southern part of Nakhon Phanom was split off to form the new province Mukdahan, and the Mukdahan district was renamed "Mueang Mukdahan" as the capital district of the new province.[3]
The district is divided into 13 sub-districts (tambons), which are further subdivided into 144 villages (mubans). The town (thesaban mueang) Mukdahan covers parts of tambon Mukdahan and the entire tambon Si Bun Rueang. The sub-district municipality (thesaban tambon) Dong Yen covers the whole tambon of the same name. There are a further 12 tambon administrative organizations (TAO).
| No. | Name | Thai | Villages | Pop.[4] | |
|---|---|---|---|---|---|
| 1. | Mukdahan | มุกดาหาร | 6 | 32,211 | |
| 2. | Si Bun Rueang | ศรีบุญเรือง | - | 6,850 | |
| 3. | Ban Khok | บ้านโคก | 13 | 8,401 | |
| 4. | Bang Sai Yai | บางทรายใหญ่ | 12 | 8,421 | |
| 5. | Phon Sai | โพนทราย | 13 | 8,179 | |
| 6. | Phueng Daet | ผึ่งแดด | 13 | 5,557 | |
| 7. | Na Sok | นาโสก | 16 | 9,811 | |
| 8. | Na Si Nuan | นาสีนวน | 10 | 7,240 | |
| 9. | Kham Pa Lai | คำป่าหลาย | 17 | 12,034 | |
| 10. | Kham Ahuan | คำอาฮวน | 15 | 11,645 | |
| 11. | Dong Yen | ดงเย็น | 14 | 9,911 | |
| 12. | Dong Mon | ดงมอน | 10 | 5,387 | |
| 13. | Kut Khae | กุดแข้ | 6 | 3,704 |