Background: This study was to estimate the frequency of prehypertension and to characterize patient awareness and associated cardiovascular risk factors in an urban population in Iran. Methods: During a hypertensive awareness program, a cross-sectional study was conducted on 2036 people. All participants completed a questionnaire about their demographic and anthropometric indices and were asked about symptoms, risk factors and preventive measures of hypertension. Data were compared between prehypertensive and non-hypertensive groups. Results: Prehypertension was detected in 30 (n=611) of the subjects. Previous CHD, diabetes, and hyperlipidemia were more prevalent in low prehypertension group compared to high normal blood pressure. The male sex, increasing age and body weight were positively associated with the rate of prehypertension. Only 8 of participants with prehypertension were aware about the symptoms of hypertension, 12 correctly mentioned at least three risk factors of hypertension, and 48 explained appropriate preventive measures. Conclusion: Prehypertension was prevalent in this population. Age, body weight, male sex, and previous CHD were the major determinants. Furthermore, hypertension awareness was alarmingly poor. Therefore, hypertension prevention programs focused on increasing public awareness are essential
