Following the fall of Ayutthaya to the Burmese during the Burmese–Siamese War, the future king of the Thonburi kingdom, Taksin, arrived in Rayong.

The oldest temple in Rayong, Wat Pa Pradu, is dedicated to Taksin where locals worship his spirit.

[8] Off the shoreline of Mueang Rayong District is Khao Laem Ya–Mu Ko Samet National Park, consisting of several islands.

The three provinces are to become Thailand's hub for manufacturing, research, and services tightly coupled with its ASEAN neighbors and the world logistically.

As of 21 November 2019 there are:[13] one Rayong Provincial Administrative Organization - PAO (ongkan borihan suan changwat) and 30 municipal (thesaban) areas in the province.

The non-municipal areas are administered by 37 Subdistrict Administrative Organizations - SAO (ongkan borihan suan tambon).