Background:The natural history of gallstone formation after bariatric surgery, the incidence of symptomatic gallstones, and timing of cholecystectomy are not well established.This research is being done to bring awareness to one particular postoperative consequence of bariatric surgery: gallstone development. Methods:This study was retrospective cross-sectional study to achieve the objectives of the study. A cross-sectional study because of the capture information based on data gathered for a specific point in time. Obese population who were surgically managed aby one of the bariatric surgeries. The sampling type was a non-probability convenient sample. Sample size was determined according to 95% confidence level using Epi Info software. Results: Researches filled the questionnaire from 843 participants. Among them, 15.5% had bariatric surgery (n= 131). Age at time of bariatric surgery was more than 25 years among most of participants. Male to female ratio was almost 1:1 among study participants who underwent bariatric surgery. The mean body mass index among study participants was 39.18 + 11.77 kg/m2 while the median BMI was 40.74 kg/m2. This indicates that most of study participants are morbidly obese. The most frequent type of bariatric surgery was gastrectomy operation (n= 101, 77.1%). There were a number of participants who reported having gallstone after the surgery (n= 24, 18.3%). The timing of gallstone formation varied among study participants Conclusion: The incidence of gallstone formation following bariatric surgery was relatively less that other literature. All of study participants who underwent bariatric surgery reported having complications following the surgery.