Obesity has long been considered a product of the modern life style in developed countries. Its increasing frequency in developing countries, however, points to a global paradox: a double burden of a still unsolved problem of malnutrition and of the epidemic of obesity and its comorbidities such as diabetes, hypertension, cancer and cardiovascular disease. Worldwide obesity has almost doubled since 1980. Our aim was to determine how prevalent overweight and obesity was in a population of persons diagnosed with type 2 diabetes, and to compare our results with results from the Croatian Adult Health Survey. In this retrospective observational study we investigated the prevalence of obesity in persons with type 2 diabetes by calculating body mass index. Data on 166 diabetic patients (82 males and 84 females) were obtained from the University Hospital Dubrava outpatient clinic between the dates of July 1 2013 and December 31 2014. The descriptive statistics that we extrapolated were age, duration of disease from the official diagnosis, height, weight, body mass index, waist circumference, and blood pressure values. Body mass index was calculated for almost all of the people for which had the necessary parameters of height (m) and weight (kg). We found that in people diagnosed with type 2 diabetes more than 90 percent of persons had a body mass index equal to or greater than 25 kg/m2, indicating overweight and obese. Our findings suggest that type 2 diabetic people are three times more likely to be obese in comparison to the general population, and difference is highly statistically significant. Further, obesity and type 2 diabetes do have a significant positive correlation (p<0.001). Obesity is the most important modifiable risk factor for type 2 diabetes and the majority patients with diabetes are overweight or obese.