Relatively few studies have focused on the connections between self-esteem and basic personality dimensions. The purpose of the present studies was to examine whether self-esteem level and self-esteem instability were associated with the Big Five personality dimensions and whether self-esteem instability moderated the associations that self-esteem level had with these personality features. This was accomplished by conducting a series of studies that included samples from the United States, Israel, and China. Across these studies, self-esteem level was associated with high levels of extraversion, emotional stability, agreeableness, conscientiousness, and openness, whereas self-esteem instability was associated with low levels of emotional stability, agreeableness, and conscientiousness. Individuals with stable high self-esteem reported the highest levels of emotional stability, agreeableness, and conscientiousness, whereas those with stable low self-esteem had the lowest levels of openness. The results of these studies suggest that feelings of self-worth are associated with self-reported and perceived personality features.