Introduction: the blood supply to liver is supplied by hepatic artery which contributes to about 25% to 30 %. and from the portal vein which contributes to the remaining 70%-75%. The variations in portal venous anatomy and dimensions of portal veins are important in liver related procedures like transplant, resections, Trans jugular Intra parenchymal Porto-Systemic Shunt (TIPSS) and radiological intervention procedures. Objective: to describe the anatomic variations in branching pattern of portal vein by CECT scan method. To study the morphometry of portal vein and its major branches (length, diameter) by 3D reconstruction of CECT scan method. Method: 80 CECT scan images of patients was collected from the Radiology Department to evaluate variations in branching pattern of portal vein. Axial and post processed 2D and 3D reformations contributed for accurate evaluation of morphometry of major portal veins. Results: type I pattern of portal vein was observed in 87.5%, Type II in 10% of cases and Type III in 2.5% of cases. There was no gender difference in branching pattern and for variations of portal vein. The mean ± SD of length of main portal vein, right portal vein and left portal vein were 3.8±0.94, 1.69± 0.4, 2.91±0.71 respectively and diameters of main portal vein, right portal vein and left portal vein were 0.98±0.13, 0.68±0.08, 0.50±0.04 respectively. Conclusion: this study highlights the branching pattern and dimensions of portal veins which is prerequisite for hepatobliliary and liver transplantation surgeries.