| Official Name: | Ban Sang |
| Native Name: | บ้านสร้าง |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Prachinburi |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 30807 |
| Population As Of: | 2005 |
| Population Density Km2: | 85.3 |
| Area Total Km2: | 361.2 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 25150 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 2506 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 13.995°N 101.2214°W |
Ban Sang (Thai: บ้านสร้าง, in Thai pronounced as /bâːn sâːŋ/) is the westernmost district (amphoe) of Prachinburi province, central Thailand.
In the past, the area of the district was dense forest with many wild elephants. Laotians from Vientiane moved to settle their village in the area, which they named Ban Chang (lit., 'elephant village'). Later the name changed to Ban Sang. Ban Sang district was established in 1905.
Neighboring districts are (from the northwest clockwise): Ongkharak, Mueang Nakhon Nayok, and Pak Phli of Nakhon Nayok province; Mueang Prachinburi and Si Mahosot of Prachinburi Province; Ratchasan, Bang Khla, Khlong Khuean and Bang Nam Priao of Chachoengsao province.
The important water resource is the Prachinburi River.
The district is divided into nine sub-districts (tambons), which are further subdivided into 93 villages (mubans). Ban Sang itself is a township (thesaban tambon) which covers parts of tambons Ban Sang and Bang Krabao. There are a further seven tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Ban Sang | บ้านสร้าง | 15 | 5,440 | ||
| 2. | Bang Krabao | บางกระเบา | 10 | 3,326 | ||
| 3. | Bang Toei | บางเตย | 10 | 2,772 | ||
| 4. | Bang Yang | บางยาง | 13 | 3,839 | ||
| 5. | Bang Taen | บางแตน | 13 | 4,296 | ||
| 6. | Bang Phluang | บางพลวง | 11 | 5,800 | ||
| 7. | Bang Pla Ra | บางปลาร้า | 8 | 2,268 | ||
| 8. | Bang Kham | บางขาม | 6 | 1,640 | ||
| 9. | Krathum Phaeo | กระทุ่มแพ้ว | 7 | 1,426 |