This paper analyses the mediating role of interorganizational relations, specifically strength of ties and relational trust, in the relationship between the level of sense of belonging to the industrial district (ID) and firms' knowledge acquisition. Despite the significance of the sense of belonging in the field of IDs, there are hardly any studies that directly address the implications of this sense of belonging on key variables in the field of ID, such as knowledge acquisition. This is due to its subjective and complex nature, meaning it is difficult to measure (Molina-Morales & Vázquez, 2007). Furthermore, since IDs are configured as a network of interorganizational relationships (McEvily & Zaheer, 1999), and