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Colonic diverticulosis is a common condition with obscure pathogenesis. Obesity, hyperlipidemia and hypertension have been demonstrated to increase the risk of complicated diverticular disease, but the impact of metabolic risk factors on the prevalence of uncomplicated diverticulosis has not been clearly determined. The aim of the study was to examine the impact of obesity and metabolic syndrome on the prevalence of colonic diverticulosis. This retrospective case-control study included patients aged 40–85 years who were followed up by the Institute of Medical Screening in Israel and underwent colonoscopy in 2006–2011 for indication of colorectal cancer screening. Patients with diverticulosis as detected by colonoscopy were compared to patients without diverticulosis. The comparison parameters included medical history, biometric parameters, biochemical and lipid profile.