["Journal of School Health, Volume 96, Issue 8, August 2026. ", "\nABSTRACT\n\nBackground\nThis study evaluates changes in bullying before (2009–2019) and after the onset of the novel coronavirus (COVID‐19) pandemic (2021–2023) in grades 9–12.\n\nMethods\nA repeated cross‐sectional study analyzed data (2009–2023) from the Youth Risk Behavior Surveillance System. An interrupted time series analysis was conducted to estimate changes in the level of and the trend of bullying.\n\nResults\nSchool bullying (n = 123,952) decreased by 5.14 percentage‐points following the pandemic, most pronounced among females (−8.76 percentage‐points) and non‐Hispanic Whites (−6.82 percentage‐points). However, school bullying resurged as the pandemic subsided. While online bullying (n = 107,853) had no notable change during the mid‐pandemic period, a stratified analysis revealed a 4.55 percentage‐point increase among males and a 3.72 percentage‐point decrease among females.\n\nImplications for School Health Policy, Practice, and Equity\nBullying prevention efforts should move beyond individual‐level interventions to address the structural features of school environments. The variations in trends across student populations suggest that targeted strategies that account for subgroup‐specific vulnerabilities may be beneficial.\n\nConclusions\nThe COVID‐19 pandemic was associated with short‐term reductions in the level of bullying on school property. Future studies are warranted to further our understanding of the specific reasons for these changes, particularly regarding attitudes and behaviors.\n"]