Odd Højdahl (5 January 1921 – 23 February 1994) was a Norwegian trade unionist and politician for the Labour Party.
As an elected politician he served as a deputy representative to the Norwegian Parliament from Oslo during the term 1961–1965.
On the local level he was a member of Oslo city council from 1953 to 1957.
Having studied law from 1941 to 1943, after World War II he worked one year as a police officer and then as a civil servant.
He later rose in the hierarchy of the Confederation to serve as secretary from 1960 to 1969 and then vice chairman from 1969 to 1977.