Peer victimization, also referred to as bullying victimization, is associated with deleterious mental health outcomes including depression and suicidality. However, most of the bullying literature in the USA is centered around the experiences of non-Latinx White and African American adolescents. To center Latinx experiences, this cross-sectional study includes a sample of Latinx students from 19 Colorado high schools (n = 2554). School-level ethnic peer representation (proportion of Latinx peers) and individual student’s willingness to seek help were examined independently as moderators between bullying victimization and mental health outcomes (depression and suicidality) separately by gender. Results indicated that Latinx youth who experienced peer victimization also reported higher symptoms of depression and suicidality. A greater willingness to seek help was associated with less symptoms of depression and suicidality among young Latinx youth, while school-level ethnic peer representation was only associated with lower symptoms of depression for Latinx adolescent females. Among Latinx youth who were victimized, a greater willingness to seek help was protective for symptoms of depression and suicidality. Results suggest that school-based programs for bullying prevention and mental health promotion need to examine culturally specific protective factors to reduce victimization and promote help-seeking norms among Latinx youth.