Si Mueang Mai District

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Si Mueang Mai
Amphoe location in Ubon Ratchathani Province
Amphoe location in Ubon Ratchathani Province
Coordinates: 15°29′43″N 105°16′43″E / 15.49528°N 105.27861°E / 15.49528; 105.27861Coordinates: 15°29′43″N 105°16′43″E / 15.49528°N 105.27861°E / 15.49528; 105.27861
Country  Thailand
Province Ubon Ratchathani
Seat Na Kham
 • Total 1,310.0 km2 (505.8 sq mi)
Population (2005)
 • Total 65,443
 • Density 50.0/km2 (129/sq mi)
Time zone THA (UTC+7)
Postal code 34250
Geocode 3402

Si Mueang Mai (Thai: ศรีเมืองใหม่, pronounced [sǐː mɯ̄a̯ŋ màj]) is a district (Amphoe) in the northeastern part of Ubon Ratchathani Province, northeastern Thailand; it may also be spelled Sri Mueang Mai.


Historically, the area was Khwaeng Mueang Khong Chiam. The head of the khwaeng was Upahad (อุปฮาด), who reported to the governor of Ubon Ratchathani. In 1903 the office of Khong Chiam was moved from Ban Na Kho to Ban Na Pho Klang.

In 1912 the office of Khwaeng Mueang Khong Chiam Tai was moved to Ban Na Ueat, Tambon Na Kham. In 1914 was moved again to Ban Dan Pak Mun, Tambon Suwan Wari Noi, and subsequently was district was renamed to Suwan Warin. In 1939 it got back its historical name Khong Chiam.[1] Finally the district office was moved to Rong Kham Ma Chok in 1957.

On September 14, 1971 the district Khong Chiam was renamed to Si Mueang Mai. At the same time the district Ban Dan, split off from Khong Chiam in 1959, received the name Khong Chiam, as it contained the central part of the historical Mueang.[2]


Neighboring districts are (from the southeast clockwise) Khong Chiam, Phibun Mangsahan, Tan Sum, Trakan Phuet Phon and Pho Sai. To the east across the Mekong river are the Laotian provinces of Salavan.

The important water resource is the Mekong River.


The district is subdivided into 11 subdistricts (tambon), which are further subdivided into 118 villages (muban). Si Mueang Mai is the only township (thesaban tambon) of the district, covering parts of the tambon Na Kham. There are further 11 Tambon administrative organizations (TAO).

No. Name Thai name Villages Inh.
1. Na Kham นาคำ 15 12,449
2. Kaeng Kok แก้งกอก 7 4,499
3. Ueat Yai เอือดใหญ่ 8 3,712
4. Warin วาริน 11 5,475
5. Lat Khwai ลาดควาย 8 4,581
6. Song Yang สงยาง 14 6,106
7. Ta Bai ตะบ่าย 12 4,175
8. Kham Lai คำไหล 18 9,426
9. Nam Thaeng หนามแท่ง 11 7,274
10. Na Loen นาเลิน 7 3,409
11. Don Yai ดอนใหญ่ 7 4,337


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