The authors investigated the structure and measurement of ethnic identity using the Multigroup Ethnic Identity Measure (MEIM; J. S. Phinney, 1992) on a diverse sample of Asian American college students. The authors drew upon 3 previously published datasets to examine the factor structure of the MEIM, initial reliability and construct validity, demographic group differences, and concurrent validity with psychological well-being. The authors identified a 3-factor structure of the MEIM composed of Cognitive Clarity, Affective Pride, and Behavioral Engagement, and these 3 ethnic identity subscales demonstrated acceptable reliability and construct validity with some initial evidence for differential concurrent validity on 2 measures of well-being.