The present studies are the first in which social psychological methods were used to test the popular claim that the experience of concealing a stigmatized social identity leads to a "divided self." For people with concealable stigmas, concealment in public settings makes the public-private dimension of self-expression particularly salient, leading them to organize self-relevant information along this dimension. The result is a strengthened cognitive distinction between public and private aspects of the self, what we have termed public-private schematization. We developed and tested a measure of the cognitive accessibility of the distinction between public and private self-schemas by measuring how quickly participants sorted trait attributes into self-in-public (e.g., self-at-work) and self-in-private (e.g., self-at-home). People with more accessible distinct public and private self-schemas should be faster at categorizing trait attributes into public- and private-self aspects than those with more integrated public and private self-schemas. Relative to people without such identities, people with concealable stigmas (Study 1a, sexual orientation; Study 1b, religiosity at a secular college), show greater public-private schematization. This schematization is linked to concealment (Study 2) and to the experimental activation of concealable versus conspicuous stigmatized identities (Study 3). Implications of distinct public and private self-schemas for psychological well-being are explored in Studies 4 and 5. Two different measures of distress-perceived social stress (Study 4) and depressive symptoms (Study 5)-provided evidence showing that the accessibility of the distinction between public and private self-schemas accounted for the association of concealment on heightened distress. Implications for research on concealment and self-structure are discussed.