Phang Nga is one of the southern provinces (Changwat) of Thailand, on the shore of the Andaman Sea to the west and Phang Nga Bay to the south. Neighbouring provinces, from north and moving clockwise, are Ranong, Surat Thani, and Krabi. Towards the south of Phang Nga is the Phuket province, connected by the Sarasin Bridge.

The provinces of Thailand are administrative divisions of the government of Thailand. The country is divided into 76 provinces proper, with one additional special administrative area. They are the primary local government units and act as juristic persons. They are divided into amphoe (districts) which are further divided into tambon, the next lower level of local government.