In the United States, cultural forces have led to the stigmatization of lesbian, gay, bisexual, transgender, and queer (and additional identities) (LGBTQ+) parenthood. However, pushing back against this stigmatization, developing a positive LGBTQ+ identity, and investing in one's LGBTQ+ community may inform empowering narratives of future parenthood and related constructs, such as LGBTQ+ parent socialization. Perceived self-efficacy related to preparation for bias (i.e., discussions of discrimination, prejudice, or bias-based bullying) socialization is likely associated with an individual's own perceptions or experiences of stigmatization given the conceptual overlap of bias and stigma. However, other constructs related to stigmatization and socialization self-efficacy, such as positive LGBTQ+ identity or community connectedness, have yet to be simultaneously considered (to our knowledge). Further, previous research has rarely included different assessments of stigma (i.e., perceived and enacted) and/or dimensions of positive LGBTQ+ identity (i.e., authenticity and self-awareness). Thus, this study aimed to rectify these gaps and provide a greater understanding of sexual stigma and LGBTQ+ parent socialization self-efficacy. Using data from a survey-based, online, cross-sectional study of LGBTQ+ childfree adults (N = 433; M_age = 29.85 years old) in the United States, we found that experiences of enacted or perceived sexual stigma were differentially associated with LGBTQ+ parent socialization preparation for bias self-efficacy. Further, positive LGBTQ+ identity authenticity and self-awareness, as well as LGBTQ+ community connectedness played distinct roles as mediators of the relationships between sexual stigma and LGBTQ+ parent socialization self-efficacy. These findings have implications for how we might understand the role of stigma, identity, community, and socialization among future LGBTQ+ parents. (PsycInfo Database Record (c) 2024 APA, all rights reserved).