Bo Phloi (Thai: บ่อพลอย, pronounced [bɔ̀ː pʰlɔ̄ːj]) is a district (amphoe) of Kanchanaburi province, central Thailand.

[2] Neighboring districts are (from the south clockwise) Tha Muang, Mueang Kanchanaburi, Si Sawat, Nong Prue, Lao Khwan, Huai Krachao, and Phanom Thuan of Kanchanaburi Province.

The district is divided into six sub-districts (tambons), which are further subdivided into 77 villages (mubans).

Nong Ri covers parts of tambon Nong Ri, and Bo Phloi covers parts of tambons Bo Phloi and Chong Dan.

Missing numbers are tambon which now form Nong Prue District.