Background: To estimate and compare prevalence of overweight and obesity among adult people across the 22 districts of Tehran in 2011. Methods: This was a cross-sectional study using data on 47,406 women and 47,525 men aged� 15 years from a large population-based survey (Urban HEART-2). Age-standardized prevalence (ASP) of overweight (25�BMI<30) and obesity (BMI�30) were estimated for the Tehran's districts. Pearson Chi2 tests and logistic regression were used to examine any significant differences in prevalence of these disorders across sociodemographic groups. Results: ASPs of overweight were 36.5 and 32.0 among men and women, respectively (p<0.001). These figures for obesity were 10.7 and 15.3 among men and women, respectively (p<0.001). Crude prevalence of overweight and obesity rose with age up to the age of 54 years and decreased thereafter. Across education groups, the lowest prevalence of overweight/obesity was seen among most educated people. The results showed that being young, single and student were associated with lower odds of overweight/obesity. Conclusion: This study showed a high prevalence of overweight and obesity among adult in Tehran. There were significant associations between sociodemographic characteristics and prevalence of overweight/obesity among adults in Tehran. The results of this study might be used in identifying high risk groups of overweight and obesity in Tehran
