Amphoe location in Songkhla Province
|• Total||1,029.273 km2 (397.405 sq mi)|
|• Density||116.5/km2 (302/sq mi)|
|Time zone||THA (UTC+7)|
Historically Sadao is part of Kedah in the district of Changlun, which means 'an elephant falls' in Thai. The district was formerly part of Changlun, and was then under the overlordship of Malay Sultanate of Kedah (known as Syburi in Thai). Sadao is called Sendawa in the Malay.
When the Britain and Siam (Thailand) signed the Anglo-Siamese Treaty of 1909, deciding what belonged to whom, Changlun was divided into two parts. The main border town of Changlun became the district of Kubang Pasu, now in Kedah of Malaysia. The rest remained Thai. Tambon Sadao, together with the former minor district (King Amphoe) Prik, forms modern Sadao.
The name Sadao is the Thai word for Neem Tree.
Neighboring districts are (from the west clockwise) Khuan Don and Khuan Kalong of Satun Province, Khlong Hoi Khong, Hat Yai, Chana and Na Thawi of Songkhla Province. To the southwest is the state of Kedah and Perlis in Malaysia.
Two main border crossings with Malaysia are located in the district. The main crossing is located at Ban Dan Nok (บ้านด่านนอก), with Bukit Kayu Hitam on the Malaysian side. The other quieter crossing is at Padang Besar, with the Malaysian town of Padang Besar in Perlis on the Malaysian side. The main railway crossing between Malaysia and Thailand is also at Padang Besar.
The district is subdivided into 9 subdistricts (tambon), which are further subdivided into 67 villages (muban). The town (thesaban mueang) of Sadao covers the complete tambon Sadao. Padang Besar is another town which covers parts of the tambon Padang Besar. There are three subdistrict municipalities (thesaban tambon) - Prik and Phang La each covering parts of the same-named tambon, and Samnak Kham the full tambon Samnak Kham. There are further 7 Tambon administrative organizations (TAO) responsible for the non-municipal areas.
|9.||Khao Mi Kiat||เขามีเกียรติ||5||5,048|
- Subdistricts Phang La, Tha Pho and Khao Mi Kiat have postal code 90170, subdistricts Thung Mo and Padang Besa have 90240, village 1, 2, 5, 6, 7 of subdistrict Samnak Kham have 90320
- ประกาศกระทรวงมหาดไทย ประกาศตั้งอำเภอสะเดาและอำเภอตากใบ (PDF). Royal Gazette (in Thai). 26 (0 ง): 1107–1108. 1909-08-22.
- "Population statistics 2009". Department of Provincial Administration.
- amphoe.com (Thai)