Saom Thum (Khmer: សោមធំ) is a commune in Ou Ya Dav District in northeast Cambodia.

It contains three villages and has a population of 1,964.

[1] In the 2007 commune council elections, three of the commune's five seats went to the Cambodian People's Party and two went to the Sam Rainsy Party.

[2] The land alienation rates in Saom Thum was low as of January 2006.

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