In this study, analytic morphomics is applied to understand rib fractures in obese occupants in frontal and nearside crashes. Rib fracture patterns were examined in occupants involved in crashes from the International Center for Automotive Medicine database. Among these occupants, two BMI groups (nonobese and obese) with a maximum abbreviated injury scale in the chest region of > 3 (MAISthx3+) were categorized and compared. Univariate analyses were conducted for the BMI groups to compare the rib fracture incidence ratio in each rib and occupant factors based on morphomics variables. In frontal crashes, rib fractures were mainly located under the path of shoulder belt. For the obese group, fracture patterns tended to be located on the lower ribs (#6‐8). In the nearside crashes, rib fractures were located in the lateral and posterior regions. For the obese group, fracture patterns tended to be located more laterally rather than posteriorly. Morphomics related to rib angle, fat in the back, and subcutaneous fat are the major differences between the groups. The current results for rib orientation and fat distribution can highlight the importance of considering these morphomics characteristics when assessing chest injury and creating obese computer models.