Song Khwae (Thai: สองแคว, pronounced [sɔ̌ːŋ kʰwɛ̄ː]) is a district (amphoe) in the northwestern part of Nan province, northern Thailand.

The minor district (king amphoe) Song Khwae was established on 1 April 1992 with three tambons split off from Chiang Klang district.

[2] Neighboring districts are, from the east clockwise, Thung Chang, Chiang Klang and Tha Wang Pha of Nan Province, Pong and Chiang Kham of Phayao province.

The district is divided into three sub-districts (tambons), which are further subdivided into 25 villages (mubans).

This Nan Province location article is a stub.