Objective: To determine the incidence and management of post cholecystectomy biliary fistula at tertiary care Hospital.  Methodology: This was a prospective study which was conducted at general surgery department of Liaquat University of Medical and health Sciences, during one year from March 2017 to February 2018. All the patients those underwent laparoscopic cholecystectomy or open cholecystectomy, age more than15 years and either of gender were included. All the patients were evaluated for developed biliary fistula after cholecystectomies. All the patients of biliary fistula were managed conservatively and surgically and their management outcome was recorded. After operation most of patients were followed up to 6 months. The data was collected via study designed proforma. Data was analyzed by using SPSS version 20. Results: Out of 318 patients, 280 patients underwent laparoscopic cholecystectomies, 38 patients underwent open cholecystectomies. Mean age of the patients was 41.34+8.23 years. Females were in majority 233(73.3%) and males were 95(29.7%). Out of all post-cholecystectomy biliary fistula was seen in 10(3.14%) patients. Incidence of post-cholecystectomy biliary fistula was insignificantly associated with types of cholecystectomies (p=0.425), while it was highly prevalent in females (p=0.001). Conclusion: In the conclusion of this study the post cholecystectomy biliary fistula was observed to be 3.14% and mostly patients were manged via conservative treatment.