Ban Ta Khun (Thai: บ้านตาขุน, pronounced [bâːn tāː kʰǔn]) is an amphoe in western Surat Thani province, southern Thailand.

Most of the district is in the hills of the Phuket Range, with parts being protected in Khao Sok National Park and the Khlong Saeng Wildlife Sanctuary.

Mostly in Ranong Province is the Khlong Nakha Wildlife Sanctuary, which occupies the northwestern corner of the district.

[2] The fifth tambon Krai Son (ไกรสร) was later merged into Khao Phang,[3] as it was in the area flooded by Cheow Lan lake.

The slogan of the district is "High mountains, beautiful dam, rich in fruits, outstanding virtue, origin of the trunks for the city pillar".