Zoltán Jelenffy (26 October 1876 – 21 January 1924) was a Hungarian sports shooter. He competed in four events at the 1912 Summer Olympics.
Jelenffy was a military officer and served in the Royal Hungarian Army. He was also a top sportsman, competing in gymnastics, swimming, cycling, cross-country skiing, and sports shooting. He was reported to have "brought glory to the Hungarian name in rifle and pistol target shooting".
He died by suicide in 1924.
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