Sikao (Thai: สิเกา, pronounced [sìʔ.kāw]) is a district (amphoe) in the northwestern part of Trang province, Thailand.

Sikao District's administrative office is in Bohin Sub-district (Sikao townships) Neighboring districts are (from the northwest clockwise): Khlong Thom of Krabi province; Wang Wiset, Mueang Trang, and Kantang of Trang Province.

The district is divided into five sub-districts (tambons), which are further subdivided into 40 villages (mubans).

The canal would connect to the Gulf of Thailand, 135 km to the east.

This Trang Province location article is a stub.