Ernst Leuenberger (30 August 1900 – 28 July 1986) was a Swiss trade union leader.
In 1920, he found work in Biel/Bienne, and also joined the Swiss Typographers' Union (STB).
He became a part-time secretary for the union in 1932, then in 1935 moved to St Gallen to become its full-time vice president.
In 1939, he was elected as full-time central secretary of the union, based in Bern.
[1] Leuenberger focused on increasing the pay and conditions of the union's members, while avoiding industrial action.