| Official Name: | Bang Kruai |
| Native Name: | บางกรวย |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nonthaburi |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Wat Chalo |
| Subdivision Type3: | Tambon |
| Subdivision Name3: | 9 |
| Subdivision Type4: | Muban |
| Subdivision Name4: | 41 (administrative) |
| Established Title: | District established |
| Established Date: | 1904 |
| Population Total: | 132,881 |
| Population As Of: | 2017 |
| Population Density Km2: | 2,314.67 |
| Area Total Km2: | 57.408 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 11130 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 1202 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 13.805°N 100.4728°W |
Bang Kruai (Thai: บางกรวย, in Thai pronounced as /bāːŋ krūa̯j/) is a district (amphoe) in the southern part of Nonthaburi province, central Thailand.
The district was created in 1904 and named Bang Yai. Due to its size it was difficult to administer, and thus in 1917 the northern part was split off as minor district (king amphoe), Bang Mae Nang. In 1921 Bang Mae Nang became a full district.
On 19 October 1930 the district was renamed "Bang Kruai", after the geographic shape of district. Kruai is the Thai word for 'cone'. On the same date, Bang Mae Nang received the old name of the district, "Bang Yai".[1]
Neighbouring districts are (from north clockwise) Bang Yai, Mueang Nonthaburi, the districts Bang Sue, Bang Phlat, Taling Chan, Thawi Watthana of Bangkok, and finally Phutthamonthon (Nakhon Pathom province).
The district is divided into nine sub-districts (tambons), which are further subdivided into 60 villages (mubans). Since 2002 Bang Kruai itself has had town (thesaban mueang) status. Plai Bang has had township (thesaban tambon) status since 1999. Sala Klang has had township status since 2008. Bang Si Thong has had township status since 2013. There another three tambon administrative organizations (TAO).
| No. | Name | Thai name | ||||||
|---|---|---|---|---|---|---|---|---|
| 1. | Wat Chalo | วัดชลอ | 6. | Bang Khu Wiang | บางคูเวียง | |||
| 2. | Bang Kruai | บางกรวย | 7. | Maha Sawat | มหาสวัสดิ์ | |||
| 3. | Bang Si Thong | บางสีทอง | 8. | Plai Bang | ปลายบาง | |||
| 4. | Bang Khanun | บางขนุน | 9. | Sala Klang | ศาลากลาง | |||
| 5. | Bang Khun Kong | บางขุนกอง |
Bang Kruai as well as neighbouring Bang Yai and Mueang Nonthaburi is the last natural habitat of the Alexandrine parakeet and red-breasted parakeet, a medium-sized parrot in Bangkok Metropolitan Region. They live in groups on large trees in some local temples, such as Wat Suan Yai, Wat Utthayan, Wat Ampawan, Wat Chaloem Phra Kiat Worawihan.[2] [3]