Abstract: Objective To examine the prevalence and family associated risk factors among children and adolescents in Chongqing city for further hypertension study. Methods A total of 11 841 students aged 6-17 years old were recruited from 12 primary and middle schools using a stratified and cluster random sampling method and their family info were collected through a questionnaire. The diagnostic criteria are based on the 2010 Chinese guidelines for the management of hypertension. Results The overall prevalence of hypertension was 16.1% with a significantly higher prevalence in boys（16.9%）than in girls（15.2%）;students from primary schools（21.4%）than from middle schools（9.1%）;and rural students（18.3%）than urban students（15.2%）（all P＜0.05）. Chi-square test indicated that delivery method,parental education level and paternal body mass index（BMI）were risk factors（P＜0.05）. Logistic regression analysis showed that C-section delivery（OR,95% CI:1.270,1.132-1.425）and paternal overweight（0.771,0.632-0.941）were associated with the risk of developing hypertension（both P＜0.05）.Conclusion Children and adolescents in Chongqing city have a relatively high prevalence of hypertension,to which C-section and paternal overweight are risk factors.