This study aimed to shed light on the prevalence of chronic peer victimisation among Dutch elementary school children and factors associated with (non-)disclosure of such experiences by victims. 5,961 students from 73 schools participated (51.5% male; M[subscript age] = 9.96; 77.7% native Dutch). Results showed that 12.3% of all children were victimised chronically, of which 29.4% did not disclose. Multilevel logistic regressions indicated that girls, older and native Dutch children were more likely to disclose. Moreover, experiencing depressive symptoms prompts disclosing victimisation. Anxiety, high emotion regulation skills, and perceptions of cohesion in the classroom were negatively associated with disclosure. The disclosure was not related to frequency or duration of victimisation, self-perceived social acceptance, self-worth, impulse control, or perceived classroom climate. Our study reveals information on the prevalence of peer victimisation and its disclosure, based on a nationwide study conducted in 2016-2017. It gives important insights into factors associated with disclosing victimisation experiences.