Idelson (Idelsohn) Jerry (1893, Libava, Courland Governorate – 1974, Johannesburg), was a viola player and composer.

Jerry Idelson studied at the Libava School of Music (1906–10). He moved to South Africa in 1912 and studied at the University of the Witwatersrand (1920–21) and the Cape Town Music College (1922–23). Jerry was a viola player in the Cape Town Municipal Orchestra (1916–17 and 1922–23) and the principal viola player for the South African Broadcasting Corporation (1932–46), receiving their prize in 1942. He was also the musical director for the United Progressive Jewish Congress, Johannesburg, from 1933. Furthermore, he founded and was the first secretary of the South African Composers' Society (1944–52), later becoming its chairman (1952–54). Jerry composed over 200 songs in Hebrew, English, German, Afrikaans, and Bantu, as well as choral, instrumental, and orchestral works, some of which were recorded by the South African Broadcasting Corporation.