Motor vehicle crashes are the leading cause of death among teens in the United States, accounting for approximately one third of deaths in this age group. Crash risk is highest during the first years of independent driving. To characterize trends in fatal crashes involving drivers aged 16 or 17 years, CDC analyzed data from the Fatality Analysis Report System (FARS) for 2004-2008. This report summarizes the results of that analysis, which indicated that, during 2004-2008, a total of 9,644 passenger vehicle drivers aged 16 or 17 years were involved in fatal crashes. During that period, the annual population-based rate for drivers aged 16 or 17 years involved in fatal crashes declined 38%, from 27.1 per 100,000 population in 2004 to 16.7 in 2008. By state, 5-year annualized rates for drivers aged 16 or 17 years involved in fatal crashes ranged from 9.7 per 100,000 population in New Jersey and New York to 59.6 in Wyoming. To further reduce fatal crashes involving young drivers, states should periodically reexamine and update graduated driver licensing (GDL) programs, and communities should vigorously enforce laws on minimum legal drinking age, blood alcohol concentration (BAC), and safety belt use, all of which can reduce the number of fatal crashes among young drivers.