Chonburi is a province of Thailand (changwat) located in eastern Thailand. Its capital is also named Chonburi. Neighbouring provinces are Chachoengsao, Chanthaburi, and Rayong, while the Bay of Bangkok is to the west. Pattaya, a major tourism destination in Thailand, is located in Chonburi, along with Laem Chabang, the country's primary seaport. The population of the province has grown rapidly and now totals 1.7 million residents, although a large portion of the population is floating or unregistered. The registered population as of 31 December 2018 was 1.535 million.

Chanthaburi is one of seven provinces (changwat) in eastern Thailand, on the border with Battambang and Pailin of Cambodia, on the shore of the Gulf of Thailand. Neighbouring provinces are Trat in the east and Rayong, Chonburi, Chachoengsao, and Sa Kaeo to the west and north.