The origin of the name is unclear, but it may originate from the Javanese word lantas, meaning a type of grill for fish. The name of the island was officially changed to "Ko Lanta" in 1917.

From archaeological discoveries, it is believed that the area was one of the oldest communities in Thailand dating back to the prehistoric period. It is believed that this province may have taken its name after the meaning of Krabi, which means sword. This may have stemmed from a legend that an ancient sword was unearthed prior to the city’s founding.

Ko Lanta National Park covering a total area of 152 square kilometres, Mu Ko Lanta National Park is located in Amphoe Ko Lanta and consists of many islands. The two major islands are Ko Lanta Yai and Ko Lanta Noi

Lanta Old Town It's one of the region’s most culturally diverse with Chinese merchants, original Thai fishing families and an ancient Sea Gypsy community. Many years ago, Ko Lanta's Old Town acted as the port and commercial center for the island and provided a safe harbor for Arabic and Chinese trading vessels sailing between the larger ports of Phuket, Penang and Singapore.

Khao Mai Kaew Caves These Caves, located in the centre of the island, house impressive stalactites and stalagmites, some of the caves are just very large and one contains a pool.

Sea-Gypsy Village Known to the Thais as Chao-Le, sea gypsies have occupied the area for hundreds of years settling along the coast in stilt-built houses erected in the sea. They are unique in that they mix very little with the general population, speak their language and have their very own supernatural and traditional beliefs and rituals.

Orchid Nursery Farm This farm is for those who like flowers. The Orchid Nursery Farm is located at Long Beach (Pra Ae beach).