| Official Name: | Bang Sao Thong |
| Native Name: | บางเสาธง |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Samut Prakan |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Bang Sao Thong |
| Subdivision Type3: | Subdistricts |
| Subdivision Name3: | 3 |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 77,519 |
| Population As Of: | 2017 |
| Population Density Km2: | 675.31 |
| Area Total Km2: | 114.79 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 10570 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 1106 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 13.595°N 100.8306°W |
Bang Sao Thong (th|บางเสาธง; pronounced as /th/) is a district (amphoe) of Samut Prakan province in central Thailand.
Neighboring districts are Lat Krabang to the north, Bang Bo to the east and Bang Phli to the west.
Bang Phli New Town (Thai Mueang Mai Bang Phli) was established between 1992 and 1993 as a residential area for high-income families. The area around the new town, comprising three tambons, was then split off from Bang Phli district and formed the new minor district (king amphoe), becoming effective on 1 April 1995.[1]
The Thai government, on 15 May 2007, upgraded all 81 minor districts to full districts.[2] On 24 August 2007 the upgrade became official.[3]
Nissan has an automobile factory in the district. Nissan produces hybrid electric vehicles (HEVs) there based on its e-Power technology as well as batteries for electric vehicles. It has a production capacity of 370,000 vehicles a year. [4]
The district is divided into three sub-districts (tambon), which are further subdivided into 39 villages (muban). Bang Sao Thong is a township (thesaban tambon) which covers parts of tambon Bang Sao Thong and Sisa Chorakhe Yai. Each of the tambons has a tambon administrative organization (TAO) responsible for non-municipal areas.
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Bang Sao Thong | บางเสาธง | 17 | 52,488 | ||
| 2. | Sisa Chorakhe Noi | ศีรษะจรเข้น้อย | 10 | 12,986 | ||
| 3. | Sisa Chorakhe Yai | ศีรษะจรเข้ใหญ่ | 12 | 12,045 |