Blanca Catalán de Ocón y Gayolá (22 August 1860 - 17 March 1904) was a Spanish botanist, considered the first woman specialist in the field in Spain.

Blanca Catalán de Ocón y Gayolá was born on 22 August 1860 in Calatayud, in the Province of Zaragoza but from an early age lived with her family in Monreal del Campo, in Teruel.

[3] It was published in 1861–1880, under the name Prodromus Florae Hispanicae seu Synopsis Methodica omnium Plantarum in Hispania Sponte Nascentium vel Frequentius Cultarum quae Innotuerunt Auctoribus.

[2][8] Two of her herbaria survive: In 1888, Blanca Catalán de Ocón y Gayolá married Enrique Ruiz del Castillo, a Cartagena judge assigned to the court in Vitoria.

[11] In 2022, Madrid City Council named a green space in the Retiro Municipal District after her, Jardín Blanca Catalán de Ocón.