In spring of 2016, the National Academies of Sciences, Engineering & Medicine released the results of its thorough review of the U.S. research on bullying and cyberbullying – a significant, multi-disciplinary update. The authors reported that school-based bullying affects 18-31% of U.S. youth overall and cyberbullying 7-15% (see a summary of the report at NetFamilyNews.org).
The previous most definitive national data came from the Centers for Disease Control (CDC) in June 2014. The CDC reported that 14.8% of U.S. high school students had experienced cyberbullying "in the last 12 months." According to the Cyberbullying Research Center – about a quarter of middle and high school students have ever experienced it. Physical bullying is still more prevalent (at 19.6%, the CDC found) but decreased 7% between 2003 and 2008, the latest data available.