A thorough understanding of the sinonasal anatomy is required for the performance of a safe and successful surgery. With the aim to identify the variations in sinonasal anatomy in north Indian population twenty fresh cadaveric heads were dissected by messerklinger technique to identify various sinonasal anatomic variations in north Indian population. The variations in the key landmarks of nose and paranasal sinuses during endoscopic sinus surgery were noted and compared with other studies. Identification and differentiation of the normal and the abnormal sinonasal anatomic variations helps in preventing complications and giving optimum surgical results.