Girl-child sexual abuse (GCSA) remains a pervasive human rights and public health challenge in South-South Nigeria, with profound implications for girls’ psychosocial, emotional, and academic development. Although policy frameworks exist, the school environment continues to demonstrate limited capacity for abuse prevention and trauma recovery support. This study investigated the effectiveness of school-based counseling interventions in preventing GCSA and facilitating emotional recovery among victims. A quantitative descriptive survey design was adopted, involving 370 participants comprising 300 female students, 40 school counselors, and 30 teachers across secondary schools in Rivers, Akwa Ibom, and Bayelsa States. Data were analyzed using descriptive statistics and inferential tests, including chisquare, independent samples t-test, and oneway ANOVA.Findings revealed a high prevalence of GCSA (37%), with only 14% of cases reported, reflecting persistent stigma and weak institutional response. Results further showed that 62% of schools lacked professional counselors, while preventive awareness programs were insufficient. Inferential analysis demonstrated that the presence of structured counseling services significantly influenced abuse-prevention awareness (χ² = 17.99, p < .001) and victim recovery (t(298) = 2.67, p = .008; F(2, 297) = 4.12, p = .018). Institutional and sociocultural barriers also significantly constrained counseling effectiveness (F(4, 365) = 3.74, p = .011).The study concludes that school-based counseling interventions hold substantial potential for combating GCSA but remain underutilized due to inadequate professional capacity and cultural silence. It recommends the mandatory deployment of certified counselors, integration of trauma-informed abuse-prevention modules into school curricula, establishment of confidential reporting structures, and strengthening of inter-agency partnerships to enhance protection and recovery support for the girlchild in South-South Nigeria