Halvor Enok Sørum (5 April 1897 – 1965) was a Norwegian trade unionist and politician for the Communist Party.
When NSU changed its name to the Young Communist League in 1921, Sørum chaired the Hedmark branch from 1922 to 1923.
He was also a central board member; illegally so during the occupation of Norway by Nazi Germany which started in 1940.
[1] At the Norwegian Confederation of Trade Unions national convention in 1934, he forwarded a motion of no confidence against the leader, former communist Halvard Olsen.
In 1941 he formed a committee, together with Konrad Nordahl and Lars Evensen, to prepare illegality as well as a cooperation with Labour Party unionists.