Ko Kut (Thai: เกาะกูด, pronounced [kɔ̀ʔ kùːt]) is a district (amphoe) of Trat province, eastern Thailand, consisting of a group of islands.

In 1952, the sub-district Ko Mak was established to cover the whole island, at that time subdivided into four villages (mubans).

[4] With publication in the Royal Gazette on 24 August the upgrade became official.

[5] As local government entities, the two tambon administrative organizations (TAO) were created in 2003 and 2004 respectively.

The district is divided into two sub-districts (tambons), which are further subdivided into eight villages (mubans).