István Mészáros may refer to:
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István Mészáros (canoeist), Hungarian sprint canoeist who competed in the mid-1950s
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István Mészáros (philosopher) (1930–2017), Hungarian-born, British professor of Marxist thought
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István Mészáros (footballer, born 1899) (1899–1944), Hungarian footballer
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István Mészáros (footballer, born 1980), Hungarian footballer
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István Mészáros (weightlifter) (born 1967), Hungarian weightlifter
{{hndis, Meszaros, Istvan