This study examined the relations between core psychological self-schemas and the subjective well-being (SWB) of Turkish and California (United States) adolescents. The participants were 2,242 high school students (1,123 from Turkey and 1,119 from California). Core psychological self-schemas were measured with the Social and Emotional Health Survey-Secondary (SEHS-S) and SWB was measured by the combination of the Students' Life Satisfaction Scale (SLSS; cognitive component) and the Positive and Negative Affect Schedule for Children (PANAS-C; affective component). Significant, small effect size differences were found for self-awareness, persistence, family coherence, and behavioral self-control, favoring the Turkish adolescents, and for school support, empathy, and SWB, favoring the California adolescents. Positive associations were found between the social and emotional health self-schemas and SWB for adolescents in both cultures. Multiple regression analyses indicated that self-efficacy, self-awareness, family coherence, and