Introduction GERD is one of the complications of bariatric operations that might affect the quality of life. We aim to perform a retrospective cohort study to determine the incidence of symptomatic GERD following different types of bariatric surgery and which operations are considered a contraindication of GERD. Besides, we are attempting to identify the risk factors of GERD after bariatric surgery. Methods Medical records of 729 patients undergone bariatric operations between January 2010 and June 2019 at Shamir (Assaf Harofeh) Medical Center were reviewed. Results There was a significant difference between the type of bariatric procedure and the incidence of GERD symptoms after the operation. The incidence of symptomatic GERD in patients who underwent SG was 39.9% (p =0.0131). This was significantly higher compared to 16.4% following roux en y gastric bypass, 23.4% following LAGB, and 11% following OAGB. 113 patients out of 718 had a positive swallow test and of these patient 71 developed GERD symptoms post-operatively without correlation to the degree of reflux at the swallow test but with statistically significant correlation to the type of operation especially for SG (P-value <0.001) and to our knowledge this was never reported in the literature. Conclusion SG is a good bariatric procedure option but should be contraindicated in asymptomatic reflux contrast swallow study and symptomatic GERD patients preoperatively because of high levels of symptomatic GERD post-operatively. Asymptomatic reflux at contrast swallow study pre-operatively should be considered a risk factor for GERD after the operation.