Hat Wanakon National Park (Thai: อุทยานแห่งชาติหาดวนกร) is a sand beach and marine national park in Prachuap Khiri Khan Province, western Thailand.

[1] It overlaps two districts of Prachuap Khiri Khan: Mueang Prachuap Khriri Khan and Thap Sakae, with an area of 23,750 rai ~ 38 square kilometres (15 sq mi).

[2] The beach is on Petchkasem Road (Highway 4) about 23 km (14 mi) from Prachuap Khiri Khan town towards Thap Sakae, about 300 km (186 mi) from Bangkok.

[1] The landscape here is sparse wooded with various species such as Indian thorny bamboo, Burmese rosewood, crape myrtle, Queen's flower and teak.

Surrounding them is the most abundant coral reef in the Gulf of Thailand.