Ban Lat (, ) 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 (à ¸Âà ¹Âà ¸²à ¸Âà ¹Âà ¸²à ¸Â), it was renamed Ban Lat in 1939.
The production of palm sugar (; ) is a specialty of the district.
The district is divided into 18 sub-districts (tambons), which are further subdivided into 115 villages (mubans). Ban Lat is a sub-district municipality (thesaban tambon) and covers tambon Ban Lat. There are a further 14 tambon administrative organizations (TAO).