Colonial mentality, or internalized colonialism, has been discussed by scholars and by Filipino American community members as a significant factor in the experiences of contemporary Filipino Americans, yet this construct has not received empirical attention in psychology. The authors of the current study addressed this gap in the Asian American psychological literature by developing the Colonial Mentality Scale for Filipino Americans, a theoretically derived and psychometrically tested multidimensional measure of colonial mentality. Exploratory (n = 292) and confirmatory (n = 311) factor analyses on Internet-obtained data suggest that colonial mentality among Filipino Americans is best conceptualized and measured as composed of 5 related factors, each of which represents unique manifestations of the construct. Results also suggest that colonial mentality is associated with the psychological well-being and mental health of modern day Filipino Americans. Research and clinical implications are discussed.