Introduction: Airway hyper-responsiveness due to biochemical effects of adipose tissue related cytokines and adipokines, and mechanical changes in lung function due to obesity play an important role in outcome of asthma in obesity. In this study we correlate the severity of asthma and body mass index. Methods: Cross-sectional- observational study including 78 patients with bronchial asthma confirmed by history, physical findings and pulmonary function test attending Father Muller Medical College Hospital during November 2018- December 2019. Results Among 78 patients 27 (34.7%) had normal Body Mass Index (BMI), 35 (44.4%) were overweight and 16 (20.8%) were obese. Out of 35 overweight patients 15(46.8%) had uncontrolled asthma and 17(53%) had partly controlled asthma. Out of 16 obese patients 13(86.6%) had uncontrolled asthma and 2(13.3%) had partly controlled asthma. There was a significant correlation between BMI and asthma control with p – value <0.05. Conclusion: Partly controlled and uncontrolled asthma were partly associated with overweight and obesity. There is a need for further studies to demonstrate the effect of weight reduction in asthma control