Hypertension is an important modifiable risk factor for cardiovascular diseases. This study aimed to determine the up-to-date prevalence, awareness, treatment, and control of hypertension, and their related influencing factors in adults in Beijing, China. A cross-sectional study was conducted in 2008. A total of 5760 adults aged 18-79 years were selected from the general population. Data from a standardized questionnaire, physical examination, and blood sample were obtained. The prevalence of hypertension was 35.5% (41.8% in men, 30.9% in women) and increased with age in both sexes. The prevalence was similarly high in urban (35.6%) and in rural (34.9%) areas. Body mass index (BMI) and waist circumference were independently associated with hypertension. Participants with diabetes and/or dyslipidemia had higher prevalence of hypertension than their counterparts. Among hypertensive patients, 42.5% were aware of the diagnosis, 35.9% received treatment, and 11.8% had hypertension control. Awareness and treatment of hypertension were low in men, young people, and rural residents. Control of hypertension was lower in older people and those with lower educational attainment. High waist circumference (central obesity) resulted in low control of hypertension (odds ratio = 0.45). Our findings underscore the urgent need to develop a comprehensive health strategy for the prevention, detection, and control of hypertension to avert the cardiovascular disease epidemic in Beijing.