Zelmar Michelini (Montevideo, Uruguay, 20 May 1924 – Buenos Aires, Argentina, 20 May 1976) was a Uruguayan reporter and politician, assassinated in Buenos Aires in 1976 as part of Operation Condor.

Zelmar Michelini was member of the Chamber of Deputies from 1954-58, and then of the Chamber of Senators starting in 1966. he was Minister of the Industry under Óscar Gestido's presidency (Colorado Party), before renouncing in 1970 because of disagreements with the government's policies. At that time he left the conservative Colorado party to become a member of the Christian Democrat party of Uruguay. Alongside other left-wing parties (Communist and Socialist Party and others independent left-wing groups), he participated in the foundation of the Frente Amplio coalition ("Broad Front") in 1971. Reporter in the newspaper Acción, he also founded in the 1960s the weekly Hechos. Michelini became again senator in 1971, as a member of the Frente Amplio. However, he had exiled himself to Buenos Aires after the 1973 coup and started denouncing the human rights violations committed by Bordaberry's dictatorship.^{[citation needed]}