To date little is known about whether and how perfectionism relates to indices of psychological well–being. Using Ryff's (1989) conceptualization of psychological well–being as composed of six theoretically and empirically distinguishable dimensions (viz., self–acceptance, positive relations with others, autonomy, environmental mastery, purpose in life, and personal growth), the present study examined the links between perfectionism, stress, and dimensions of psychological well–being in a sample of 265 college students. The results of conducting a series of path analyses indicated that stress fully mediated the relations between socially prescribed perfectionism and three dimensions of psychological well–being, namely, autonomy, environmental mastery, and purpose in life. A mediation model involving self–oriented perfectionism and other–oriented perfectionism could not be tested. Implications of the present …