Thai Mueang (, ) is a district (amphoe) in Phang Nga province in the south of Thailand.
Neighboring districts are (from the north clockwise): Takua Pa, Kapong, Mueang Phang Nga, and Takua Thung. To the west is the Andaman Sea.
Khao LampiâÂÂHat Thai Mueang National Park was established in 1986 and covers 72 km<sup>2</sup>. The park consists of two parts: the beach of Thai Mueang as well as natural rain forest on Lampi mountain.
The district is divided into six sub-districts (tambons), which are further subdivided into 40 villages (mubans). Thai Mueang itself has township (thesaban tambon) status. There are six tambon administrative organizations (TAO).