The pelvis is an important component of the axial skeleton that connects the lower extremities to the rest of the body via the lumbosacral spine. Its ring-shaped structure surrounds and protects important internal organs such as the bladder, intestines, and reproductive organs, as well as major nerves and blood vessels. Pelvic fractures account for approximately 10% of fractures seen in blunt trauma patients. The overall incidence of pelvic fractures in the United States is reported to be approximately 37 per 100,000 people per year, but they are more common in individuals aged 15–28. Men under 35 and women over 35 are the most affected groups. Pelvic fractures are generally bimodal: high-energy trauma such as traffic accidents and falls from heights is required in young patients, while low-energy trauma may be sufficient in elderly patients, especially those with osteoporosis. While 2.1 pelvic fractures per 100,000 people are observed in non-osteoporotic patients, it has been reported that these fractures are 1,000 times more common in osteoporotic patients (4). However, under these conditions, the incidence of pelvic ring fractures is relatively low compared to other fractures in the body (3% to 8%). This review will discuss the epidemiology and classification of pelvic trauma.