Thung Fon (Thai: ทุ่งฝน, pronounced [tʰûŋ fǒn]; Northeastern Thai: ท่งฝน, pronounced [tʰōŋ fǒn]) is a district (amphoe) in the eastern part of Udon Thani province, northeastern Thailand.

Neighboring districts are (from the south clockwise) Nong Han, Phibun Rak, Ban Dung of Udon Thani Province, Phon Phisai and Sawang Daen Din of Sakon Nakhon province.

[2] The district is divided into four sub-districts (tambons), which are further subdivided into 36 villages (mubans).

Thung Fon is a township (thesaban tambon) which covers parts of tambon Thung Fon.

This Udon Thani Province location article is a stub.