Sawang Daen Din (Thai: สว่างแดนดิน, pronounced [sā.wàːŋ dɛ̄ːn dīn]; Northeastern Thai: สว่างแดนดิน, pronounced [sā.wāːŋ dɛ̄ːn dīn]) is a district (amphoe) in the western part of Sakon Nakhon province, northeast Thailand.

Neighboring districts are (from the north clockwise) Charoen Sin, Wanon Niwat, Phang Khon, Waritchaphum, and Song Dao of Sakon Nakhon Province, Chai Wan, Nong Han, Thung Fon, and Ban Dung of Udon Thani province.

The district dates back to Mueang Sawang Daen Din, which was converted into an amphoe during the Thesaphiban administrative reforms around 1900.

[1] Sawang Daen Din is divided into 16 sub-districts (tambons), which are further subdivided into 189 administrative villages (mubans).

Missing numbers are tambon which now form Charoen Sin District.