Introduction: The dominant coronary artery is that which gives the posterior interventricular branch, traversing the posterior interventricular sulcus and supplying the posterior part of the ventricular septum and often part of the posterolateral wall of the left ventricle as well. In various studies the right coronary artery dominance was observed in 63-90% cases, left coronary artery dominance was observed in 6-20% cases and Co-dominance was observed in 1-28% cases by various methods of study. Material and Methods: 55 heart specimens were dissected and 82 cases of angiography were studied. The dominance pattern along with sexual dimorphism were noted and analysed. Result: Amongst the total 137 cases right dominance was found in 72.3%, left dominance in 15.3% and co-dominance in 12.4%. Right dominance was found in 67.6% males & 85.7% females, Left dominance in 15.7% males & 14.3% females, Codominance in 16.7% males & in females no case of co-dominance was found. Conclusions: In females Right dominance was more than in males, while Left dominance and Co-dominance was more in males. The difference in dominance pattern male and females is statistically significant.