Ao Luek (Thai: อ่าวลึก, pronounced [ʔàːw lɯ́k]) is a district (amphoe) in Krabi province, Thailand.

Neighbouring districts are (from the North clockwise): Plai Phraya, Khao Phanom, and west Thap Put.

Than Bok Khorani National Park was established on 30 September 1998 and covers 104 km2 of coastal limestone hills and 23 islands off the coast.

In the national park is the skull cave (Tham Hua Kalok), containing prehistoric paintings.

[2] Ao Luek is divided into nine sub-districts (tambons), which are further subdivided into 52 administrative villages (mubans).