Josep Puig i Cadafalch (Catalan pronunciation: [ʒuˈzɛp ˈputʃ]) (Mataró, 17 October 1867 – Barcelona, 21 December 1956) was a Catalan Spanish Modernista architect who designed many significant buildings in Barcelona. He was the architect of the Casa Martí (also known as "Els Quatre Gats"), which became a place of ideas, projects and social gatherings for such well-known Catalans as Santiago Rusiñol and Ramon Casas.

Although Puig's style separated him significantly from his contemporary Gaudí, their relations were neither tense nor problematic, as demonstrated by the participation of both architects in the construction of the Cafe Torino. Another of his significant buildings was the Casa Terrades (also known as "les Punxes"), which is known for its medieval castle style from the north of Europe. From 1942 to his death in 1956, he was the president of the academic institution of the Catalan language, the Institut d'Estudis Catalans.