Ban Sang (Thai: บ้านสร้าง, pronounced [bâːn sâːŋ]) is the westernmost district (amphoe) of Prachinburi province, central Thailand.

[1] In the past, the area of the district was dense forest with many wild elephants.

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 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.