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Objective: The Middle East North Africa region has one of the highest rates of diabetes, both in prevalence and in rate of increase. The aim of this study was to examine the prevalence and associated risk factors of type 2 diabetes mellitus (T2D) in the adult population of Beirut., Methods: A random sample of 501 men and women aged 18 to 79 years was examined in a cross-sectional manner. The sample was then divided into 3 groups based on T2D self-report, glycosylated hemoglobin (HbA1c), and fasting glucose (no diabetes [ND], at risk for diabetes [RD], and probable diabetes [PD]). These were compared to determine the various associated risks., Results: The sample consisted of 64.3% women, with an average age of 45.4 ± 15 years, and a mean body mass index (BMI) of 29.4 ± 5.9 kg/m 2 . The subjects were predominantly from a low socio-economic status, and more than half smoked either cigarettes or a waterpipe. The percentages of the 3 groups were as follows: 41.7%, 40.3%, and 18.0% for ND, RD, and PD, respectively. Out of 90 subjects diagnosed with PD, 26 did not know they had diabetes. Independent, positively associated risk factors were age, BMI, heart rate, hypertension, triglyceride, and high-density lipoprotein cholesterol., Conclusion: The prevalence of T2D was high in this study and seems to be increasing compared to prior diabetes reports. Overall, the whole sample had a high prevalence of cardiovascular risk factors such as smoking, obesity, and physical inactivity. However, subjects with diabetes had significantly more components of the metabolic syndrome., Abbreviations: ADA = American Diabetes Association CRP = C-reactive protein DD = definite diabetes FPG = fasting plasma glucose HbA1c = glycosylated hemoglobin MENA = Middle-East North Africa ND = no diabetes PD = probable diabetes RD = at risk of diabetes T2D = type 2 diabetes mellitus TSH = thyroid-stimulating hormone.