Subjective well-being (SWB) is evaluation of life in terms of satisfaction and balance between positive and negative affect; psychological well-being (PWB) entails perception of engagement with existential challenges of life. The authors hypothesized that these research streams are conceptually related but empirically distinct and that combinations of them relate differentially to sociodemographics and personality. Data are from a national sample of 3,032 Americans aged 25-74. Factor analyses confirmed the related-but-distinct status of SWB and PWB. The probability of optimal well-being (high SWB and PWB) increased as age, education, extraversion, and conscientiousness increased and as neuroticism decreased. Compared with adults with higher SWB than PWB, adults with higher PWB than SWB were younger, had more education, and showed more openness to experience.Research on well-being has flourished in recent decades (Diener, Suh, Lucas, & Smith, 1999; Kahneman, Diener, & Schwarz, 1999), with increasing recognition of the different streams of inquiry guiding this broad domain. Ryan and Deci's (2001) integrative review organized the field of well-being into two broad traditions: one dealing with happiness (hedonic well-being), and one dealing with human potential (eudaimonic well-being; Ryan & Deci, 2001; see also Waterman, 1993). In the present study, we draw and extend these distinctions, which we refer to as traditions of research on subjective well-being (SWB) and psychological well-being (PWB). We use these terms to underscore the fact that studies of SWB have repeatedly included not only affective indicators of happiness (hedonic well-being) but also cognitive assessments of life satisfaction. In addition, some aspects of PWB (e.g., personal growth, purpose in life) but not others (e.g., positive relations with others, self-acceptance) reflect the self-fulfillment meanings of eudaimonic well-being. As described below, SWB and PWB are also the overarching phrases most frequently used in studies that constitute these traditions, both of which are fundamentally concerned with subjective accounts of well-being.Our specific empirical aims are to examine whether indicators of SWB and PWB constitute taxonomically distinct reflections of well-being in a national sample of U.S. adults. Although both approaches assess well-being, they address different features of what it means to be well: SWB involves more global evaluations of affect and life quality, whereas PWB examines perceived thriving vis-à-vis the existential challenges of life (e.g., pursuing meaningful goals, growing and developing as a person, establishing quality ties to others). We further test the hypothesis that these distinct varieties of well-being are contoured by the broad categories of sociodemographic and personality factors. Specifically, we investigate the role of location in the life course (i.e., age) and position in the socioeconomic hierarchy (e.g., educational status) as well as personality traits in accounting for different profiles of well-...