Bishop Juan Alberto de la Merced Martín y Villaverde (2 May 1904 – 3 November 1960) was Bishop of the Roman Catholic Diocese of Matanzas (1938–1960).
Bishop Martin was ordained a priest on October 27, 1927.
His principal consecrator was Archbishop José Manuel Dámaso Rúiz y Rodríguez of the Archdiocese of Havana and as co-consecrators, Archbishop Enrique Pérez Serantes of the Archdiocese of Santiago de Cuba and Bishop Eduardo Pedro Martínez y Dalmau, C.P.
Bishop Martin died on November 3, 1960, at the age of 56.
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