Ernst Breit (20 August 1924 – 22 February 2013) was a German trade union leader.
Born in Rickelshof, Breit joined the Reichspost as a trainee inspector in 1941, but the following year was conscripted into the army. He later became a prisoner of war, but at the end of World War II was released and returned to the post office, working in Heide. He joined the German Postal Union (DPG), becoming part of his local works council, then in 1952 joined the executive of the Kiel district of the DPG, and from 1953 to 1959 was its chair, also serving on the union's national executive.
In 1956, Breit was promoted to run the post office in Neustadt, then from 1959 he ran the personnel department at the Federal Post Office. In 1971 he became the national chair of the DPG, and the following year was also elected to the executive of the Postal, Telegraph and Telephone International (PTTI), and as deputy chair of the Board of the Federal Post. In 1978, Breit was elected as the president of the PTTI, then in 1982 he became the chair of the German Trade Union Confederation. His time in office was difficult, working with the conservative government of Helmut Kohl, but he was well regarded, and in 1985 also became the president of the European Trade Union Confederation.
Breit retired in 1990, and died in 2013.