| Official Name: | Som Sa-at |
| Native Name: | สมสะอาด |
| Settlement Type: | Subdistrict |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ubon Ratchathani |
| Subdivision Type3: | District |
| Subdivision Name3: | Det Udom |
| Subdivision Type4: | Mubans |
| Subdivision Name4: | 12 |
| Subdivision Type5: | Number of Mu |
| Subdivision Name5: | 13 |
| Established Title: | Subdistrict established |
| Established Date: | 1892 |
| Population Total: | 10882 |
| Population As Of: | 2021 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Postal Code Type: | Postal code |
| Postal Code: | 34160 |
Som Sa-at (Thai: สมสะอาด) is a tambon (subdistrict) located in the mid-west region of Det Udom District, in Ubon Ratchathani Province, Thailand. In 2021, it had a population of 10,882 people. Neighbouring subdistricts are (clockwise from the south) Non Sombun, Na Kasem, Nong Om, Na Krasaeng, Na Charoen, and Tha Pho Si.[1]
Before 1997, Som Sa-ad tambon was governed by its subdistrict council, but such a local government has been promoted to the Subdistrict Administrative Organization of Som Sa-at (องค์การบริหารส่วนตำบลสมสะอาด; Som Sa-at SAO) in February 1997, the first subdistrict member court election happened in May that year.[2]
In 1961, together with the area divided from Kaeng, its western area which consisted of seven villages was split off to form a new subdistrict, Thung Thoeng.[3]
In 1966, together with the area divided from Na Suang and Thung Thoeng, the northern region of the tambon was split to form a new subdistrict, Na Charoen.[4]
The tambon is located in the mid-west region of the Det Udom district, on the river plain of the Lam Dom Yai River.[1]
Som Sa-at subdistrict is divided into 12 administrative villages (mubans; หมู่บ้าน), one of which, Muang village, was further divided into two community groups (Mu; หมู่).[5] The entire area is governed by the Subdistrict Administrative Organization of Som Sa-at (องค์การบริหารส่วนตำบลสมสะอาด; Som Sa-at SAO).[5]
The following is a list of the subdistrict's mubans, which roughly correspond to the villages, as of the 2021 census.[5]
| Village | Group (Mu) | Household | Population | ||
|---|---|---|---|---|---|
| Romanized name | Thai name | ||||
| Som Sa-at | สมสะอาด | ||||
| Ta Luang | ท่าหลวง | ||||
| Muang | ม่วง | ||||
| Na Di | นาดี | ||||
| Na Kham | นาคำ | ||||
| Non Sanam | โนนสนาม | ||||
| Suan Phai | สวนฝ้าย | ||||
| Nong Bua Luang | หนองบัวหลวง | ||||
| Huai Aree | ห้วยอารีย์ | ||||
| Rat Samran | ราษฎร์สำราญ | ||||
| Mai Charoen | ใหม่เจริญ | ||||
| Muang Samakki | ม่วงสามัคคี | ||||
| Total | |||||