The aim of this study is to examine the changes brought about by decentralization policies in the cultural contents industry in non-metropolitan areas, using Angoulême as a case study. The Angoulême International Comics Festival (FIBD), launched in 1974, served as the starting point for Angoulême's development as a comics city. The CIBDI, a public institution newly created in 1990, functions as a museum, cinema, documentation center, writers' center, library, and bookstore. The Magelis Image Cluster, established in 1997, contributed to the revitalization of the local image industry by creating tailored educational institutions such as EESI and Cnam-Enjmin and by supporting the establishment of businesses. The population growth of Greater Angoulême, following the creation of the public institution and the cluster, demonstrates its contribution to stabilizing the local population. Its positive economic impact on Angoulême is reflected in the establishment of new businesses, revenue generation, local job creation, the attraction of talent and young people, and increased tourism driven by cultural demand. The characteristics of the creation of the public institution and the cluster in Angoulême — new public institutions, the granting of legal status to key establishments, the focus on creating educational institutions, the linking of the cluster's education, production, and sales functions, the role of Magelis as a public promoter, and urban regeneration through cultural branding — suggest implications for the development of cultural contents industry clusters.