Na Dun (Thai: นาดูน, pronounced [nāː dūːn]) is a district (amphoe) in the south of Maha Sarakham province, northeastern Thailand.

Neighboring districts are (from the south clockwise): Phayakkhaphum Phisai, Yang Sisurat, Na Chueak, and Wapi Pathum of Maha Sarakham Province, and Pathum Rat of Roi Et province.

The area was made a minor district (king amphoe) on 1 October 1969, when the three tambons, Na Dun, Nong Phai, and Nong Khu, were split off from Wapi Pathum district.

[2] The district is divided into nine sub-districts (tambons), which are further subdivided into 94 villages (mubans).

This Maha Sarakham Province location article is a stub.