Bang Kaeo (Thai: บางแก้ว, pronounced [bāːŋ kɛ̂ːw]) is a district (amphoe) of Phatthalung province, southern Thailand.

Neighboring districts are (from the south clockwise) Pak Phayun, Pa Bon, Tamot, and Khao Chaison of Phatthalung Province, and Krasae Sin of Songkhla province.

[2] The district is divided into three sub-districts (tambons), which are further subdivided into 33 villages (mubans).

Tha Maduea is a township (thesaban tambon) which covers parts of tambons Tha Maduea and Khok Sak.

Another part of Khok Sak belongs to the township Mae Khari, centered in neighboring Tamot District.