Based on recent identity research, we developed the Multi-Dimensional Identity Scale (MDIS), and the psychometric properties of the MDIS are examined. We report the results of 3 studies used for item generation and analyses and exploratory factor structure analysis (Study 1), confirmatory factor structure analyses (Studies 1, 2, and 3), and construct validity (Study 3). Collectively, these studies illustrate the psychometric properties of a new measure of identity that is multidimensional and adaptable to various identity bases (i.e., organizational, family, social). Based on exploratory and confirmatory studies, our measure demonstrates the same factor structure for organization-based identity and social-based identity and a similar factor structure for family-based identity. Convergent and discriminant validity are demonstrated.