Background: Noncommunicable diseases (NCDs) are the main causes of mortality and disability in the world. In order for a campaign against NCDs' risk factors it is necessary to estimate the extent of their prevalence for their decrease through appropriate interventions. Objectives: The aim of this study was to determine the prevalence of NCDs' risk factors among secondary school students in Birjand city, east of Iran. Patients and Methods:In this cross-sectional study, 369 secondary school students aged between 15 -20 years were selected using randomized cluster sampling in 2013. To gather data, the national health system questionnaire regarding NCDs with a stepwise approach was used. The data were derived by health trained workers through face-to-face interview, and physical assessments including height, weight, and blood pressure in every school. Finally, the obtained data were analyzed using the chi-square and Fisher's exact tests with the SPSS software version 18.