Leó Weiner (16 April 1885 – 13 September 1960) was one of the leading Hungarian music educators of the first half of the twentieth century, and a composer.

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The early Romantics from Beethoven through Mendelssohn most strongly influenced Weiner's compositional style. His orchestration seems much indebted to later Romantic French composers not notably affected by Wagner, Bizet in particular. This conservative Romantic approach formed the basis of his style, to which elements of Hungarian folk music were added sometime later, although he was not an active field researcher of folk music as were his contemporaries Bartók and Kodály, but simply shared an interest in the subject and added elements of folk music into his established harmonic language without significantly changing it.^{[2][page needed]}

Among Weiner's notable compositions are a string trio, three string quartets, two violin sonatas, five divertimenti for orchestra, a symphonic poem, and numerous chamber and piano pieces.