Hugues Charles Robert Méray (12 November 1835, Chalon-sur-Saône, Saône-et-Loire - 2 February 1911, Dijon) was a French mathematician.
He is noted as the first to publish an arithmetical theory of irrational numbers.
His work did not have much of a role in the history of mathematics because France, at that time, was less interested in such matters than Germany.He was an Invited Speaker of the ICM in 1900 in Paris; his contributed paper was presented by Charles-Ange Laisant.