Internalized or self-stigma can be damaging to psychological and social functioning and recovery, especially for people with serious mental illness. Most studies have focused on the effects of high self-stigma, which has included both moderate and high self-stigma, versus low levels of self-stigma which has included no, minimal, or mild self-stigma. Therefore, little is known about the variation within these categories (e.g., minimal versus mild self-stigma) and its impact on recovery. This article examines differences in the demographic, clinical, and psychosocial variables associated with different levels of self-stigma severity. Baseline data (N = 515) from two concurrent randomized controlled trials of a psychosocial intervention aimed at reducing internalized stigma, and its effects among adults with serious mental illnesses were examined. We found that participants with greater psychological sense of belonging, and greater perceived recovery were significantly less likely to have mild or moderate/high internalized stigma than minimal stigma. Those reporting a greater frequency of stigma experiences, however, were more likely to have mild or moderate/high internalized stigma than minimal stigma. Our findings further underscore the multifaceted nature and impact of self-stigma, particularly in interpersonal relationships and interactions, and demonstrate the importance of attending to even mild levels of self-stigma endorsement. (PsycInfo Database Record (c) 2025 APA, all rights reserved).