Background: The anatomical variance of the foramen magnum may have some impact on certain surgical procedures such as vertebral artery and posterior inferior cerebellar artery aneurysm repairs, foramen magnum meningioma resections, and foramen magnum decompression amo ng others. In an ovoid type foramen magnum, it is difficult for a surgeon to adequately expose the anterior portion of the foramen. As the total volume in the skull is fixed and consists of blood, cerebrospinal fluid, and brain tissue, the increased press ure may lead to compensation via cerebellar tonsil herniation through the foramen magnum. The present study was conducted to find morphological shapes and morphometric features of foramen magnum. Materials and Methods: The present study conducted with 74 a dult dry skulls We have used only intact skulls, which were without any pathological abnormality, which appears with clean look and dry. We have observed the shapes of foramen magnum and incidence of shapes. We have recorded morphometric measurements like anterior posterior diameter and transverse diameter of foramen magnum with help digital Vernier sliding calliper. Results: Oval shape foramen magnum was observed in 32 number of skulls and the incidence was 43.24%, tetragonal shape foramen magnum was observed in 8 number of skulls and the incidence was 10.81%, hexagonal shape foramen magnum was observed in 6 number of skulls a nd the incidence was 8.11%, round shape foramen magnum was observed in 16 number of skulls and the incidence was 21.62%, pentagonal shape foramen magnum was observed in 7 number of skulls and the incidence was 9.45% and pear shape foramen magnum was obser ved in 5 number of skulls and the incidence was 6.75%. Conclusion: The present study data may be helpful to neurosurgeons, forensic practice and anthropologists to assess variations in shapes of foramen magnum and its size.