Gender, age and ethnic differences in the prevalence of cyberbullying were explored in a national sample of 20,849 New Zealand adults. A total of 2.2% of respondents reported being victims of cyberbullying in the past month and a further 14.9% reported past incidences of cyberbullying. The highest levels of cyberbullying were reported in the group aged 18–25 years and the lowest levels were reported in the group aged ≥66 years. Women reported slightly higher rates of ever experiencing cyberbullying than men. Māori and Pasifika reported higher levels of cyberbullying than Asians and Europeans.