Chonburi (Thai: ชลบุรี ) is a province in Thailand. Neighboring provinces are (from north clockwise) Chachoengsao, Chanthaburi and Rayong. To the west is the Gulf of Thailand. The eastern seaboard is heavily industrialized and underpinned by shipping, transportation, tourism, and manufacturing industries, and second to only Bangkok in economic output.
From historical evidence, Mueang Chonburi has been settled since the Ayutthaya period. Originally, it comprised many small towns such as Mueang Bang Sai, Mueang Bang Pla Soi, and Mueang Bang Phra. Later, King Rama V combined these towns together into Chonburi Province.