Veun Sai (Khmer: វើនសៃ) is a commune in Veun Sai District in northeast Cambodia.

It contains six villages and has a population of 2443.

[2] In the 2007 commune council elections, four seats went to members of the Cambodian People's Party and one seat went to a member of Funcinpec.

[3] Land alienation is a problem of moderate severity in Veun Sai.

[4] (See Ratanakiri Province for background information on land alienation.)