Josep Triadó Mayol was a Spanish illustrator, book designer, and painter.

During the 1890s, he devoted himself to painting and produced works of a symbolist nature and lyrical, misty landscapes. Later, he became known for his paintings of popular Catalan characters and seascapes.

He studied at the Llotja School, where he taught drawing from 1902. He learned engraving from Alexandre de Riquer, who also introduced him to the work of William Morris. Interested in everything related to the book arts, he participated in the various stages of the process: from the conception of typefaces to the design of luxurious covers, and from the creation of colophons to the embellishment of pages with vignettes of his own invention.

He also drew posters, advertisements, trademarks, menus, letters, and diplomas. He excelled in bookplates. He also produced numerous notable artistic projects for textiles, ceramics, embroidery, and jewelry.

He was artistic director of Revista Gráfica, the Catalan Institute of Book Arts, and the Yearbook of Decorative Arts.