Wang Sam Mo (Thai: วังสามหมอ, pronounced [wāŋ sǎːm mɔ̌ː]) is a district (amphoe) in southeastern Udon Thani province, northeastern Thailand.

Neighboring districts are (from the west clockwise) Si That and Chai Wan of Udon Thani Province, Waritchaphum, Nikhom Nam Un, and Kut Bak of Sakon Nakhon province and Kham Muang, Sam Chai, and Nong Kung Si and Tha Khantho of Kalasin province.

The minor district (king amphoe) Wang Sam Mo was established on 1 October 1975, when the three tambons Nong Kung Thap Ma, Ba Yao, and Nong Ya Sai were split off from Si That district.

[2] The district is divided into six sub-districts (tambons), which are further subdivided into 72 villages (mubans).

This Udon Thani Province location article is a stub.