Background: Hypertension is an important public health problem, with some variability of its epidemiological properties in different populations. Objectives: The purpose of this study was to estimate the prevalence of hypertension and to determine the hypertension awareness, treatment and control rates in Aydın, a Turkish province. Methods: Of 1600 coincidentally selected people aged over 18 years in Aydın, 1480 (92.5%) had their blood pressure (BP) measured and answered a standard questionnaire in 1995. Results: Estimates of the prevalence of hypertension and its control were computed using two different criteria to define hypertension: BP у140/90 mm Hg or on treatment and BP у160/95 mm Hg or on treatment. Overall, the estimated prevalence of hypertension was 29.6%