Covering a total area of 3,552 square kilometers, Rayong borders Chonburi Province on the north and the west, the Gulf of Thailand on the south, and Chantaburi Province on the east. Most of the land is marked by a series of mountains interspersed by flat plains and large tracts of forest and fruit plantations. Administratively, the province is divided into Mueang Rayong, Klaeng, Ban Khai, Bang Chang, Pluak Daeng and Wang Chan districts and Khao Chamao and Nikhom Phatthana Sub-districts.