The PRC originated in the Association in Defense of the Interests of Cantabria (ADIC), founded on 14 May 1976, with the objective of promoting Cantabrian autonomy.
A orixe do partido áchase na Asociación para la Defensa de los Intereses de Cantabria (ADIC), fundada o 14 de maio de 1976, co obxectivo de impulsar a vocación autonomista cántabra.