One of the most important factors that affects a person's risk of injury in a motor vehicle crash is the age of the person. This study investigates patterns of injury severity, location of injuries, and contact sources for the driver injuries by driver age. Based on the data from NHTSA's National Automotive Sampling System - Crashworthiness Data System (NASS-CDS) from 1993 through 2004, this study examines in great detail the driver injury severity, injured body regions, and injury contact sources by driver age in rollover and non-rollover real-world traffic crashes. The effect of seat belt use on injury patterns is also investigated.