| Official Name: | Mueang Ubon Ratchathani |
| Native Name: | เมืองอุบลราชธานี |
| 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: | Nai Mueang |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 211855 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 34000 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 3401 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.2289°N 104.8542°W |
Mueang Ubon Ratchathani (Thai: เมืองอุบลราชธานี, in Thai pronounced as /mɯ̄aŋ ʔù.bōn râːt.tɕʰā.tʰāː.nīː/; เมืองอุบลราชธานี, in Lao pronounced as /mɯ᷇aŋ ʔǔ.bōn lâːt.sā.tʰa᷇ː.ni᷇ː/) is the capital district (amphoe mueang) of Ubon Ratchathani province, northeastern Thailand.
The district was originally named Buphupalanikhom (บุพุปลนิคม). Later the name was changed to Burapha Ubon (บูรพาอุบล) in 1909 and Mueang Ubon Ratchathani in 1913.[1]
Neighboring districts are (from the west clockwise) Khueang Nai, Muang Sam Sip, Lao Suea Kok, Don Mot Daeng, Sawang Wirawong, and Warin Chamrap of Ubon Ratchathani Province and Kanthararom of Sisaket province.
The important water resource is the Mun River.
The district is divided into 12 sub-districts (tambons), which are further subdivided into 148 villages (mubans). The city (thesaban nakhon) Ubon Ratchathani covers the entire tambon Nai Mueang. Ubon is a township (thesaban tambon) which covers parts of tambons Kham Yai and Chaeramae. There are a further 11 tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Nai Mueang | ในเมือง | - | 86,809 | ||
| 4. | Hua Ruea | หัวเรือ | 14 | 8,968 | ||
| 5. | Nong Khon | หนองขอน | 15 | 8,436 | ||
| 7. | Pathum | ปทุม | 12 | 10,294 | ||
| 8. | Kham Yai | ขามใหญ่ | 24 | 30,471 | ||
| 9. | Chaeramae | แจระแม | 10 | 12,622 | ||
| 11. | Nong Bo | หนองบ่อ | 13 | 7,595 | ||
| 12. | Rai Noi | ไร่น้อย | 17 | 19,589 | ||
| 13. | Krasop | กระโสบ | 12 | 5,565 | ||
| 16. | Ku Talat | กุดลาด | 13 | 10,178 | ||
| 19. | Khilek | ขี้เหล็ก | 10 | 6,024 | ||
| 20. | Pa-ao | ปะอาว | 8 | 5,304 |
Ubon Ratchathani has a tropical savanna climate (Aw) with three distinct seasons i.e. the dry winters running from November to January, the build up season running from February through April, and the wet monsoon summers running from May to October. The average annual high temperature in Ubon Ratchathani is 33 °C and the average annual low temperature is 22.1 °C with April being the hottest month and December being the coolest month.