Josep Dencàs i Puigdollers (March 19, 1900 – February 13, 1966) was a Catalan nationalist politician active in the Republican Left of Catalonia.

During these months he focused on organizing the Republican Youth of Catalonia (JEREC), with the aim of gaining influence within the ERC itself.

[5] Influenced by the ultranationalist and racist ideas of Pere Màrtir Rossell i Vilar, Dencàs defined himself as a "national socialist.

The new state however only lasted ten hours, after which the forces loyal to the Madrid government managed to quash the rebellion.

In 1936 when Spanish Republican authorities restored the Catalonian government, Companys re-appointed some former officials but Dencàs, as he was blamed for the previous unsuccessful uprising.

Some authors such as Jacinto Toryho have suggested that he was involved in 1936 Catalan coup d'état attempt, through his contacts with Italian fascists.