Prachuap Khiri Khan is one of the central provinces (changwat) of Thailand. Neighboring provinces are Phetchaburi in the north and Chumphon in the south. To the west it borders Tanintharyi Division of Myanmar.

Prachuap Khiri Khan, or commonly referred to as simply Prachup, is a province located in the lower central region 93km south of Hua Hin, while much smaller and quieter than Hua Hin, Prachuap is actually the provincial capital of the same-named province.