Ban Lat (Thai: บ้านลาด, pronounced [bâːn lâːt]) is a district (amphoe) in the central part of Phetchaburi province, western Thailand.

Neighboring districts are (from the north clockwise) Khao Yoi, Mueang Phetchaburi, Tha Yang, Kaeng Krachan, and Nong Ya Plong of Phetchaburi Province.

Originally named Tha Chang (ท่าช้าง), it was renamed Ban Lat in 1939.

[1] The production of palm sugar (Thai: น้ำตาลปึก; RTGS: nam tan puek) is a specialty of the district.

[2] The district is divided into 18 sub-districts (tambons), which are further subdivided into 115 villages (mubans).