In 2002, about six children aged eight years per every 1000 people in the general population received a diagnosis of autism spectrum disorder (ASD). The corresponding figure in 2008 was about 11 children, a 78% increase in just six years. To better understand how the increasing population of people with autism may impact adult programs, the authors examined the number of youth with autism served by state vocational rehabilitation programs in 2010. To account for the states' general population sizes, the authors reported the number of youth with autism served per 100,000 in the state general population (prevalence). As Figure 1 shows, the prevalence of youth with autism who received vocational rehabilitation services varied substantially across states and ranged from 0.4 in Mississippi, Florida, South Carolina, and Nevada to a figure 14 times larger in Vermont (5.6). Since eight-year-old children diagnosed with autism in 2008 will reach transition age in 2016, it is likely that state vocational rehabilitation programs will see substantial increases in the number of youth with autism seeking services in the coming years. Programs that have not yet experienced signs of this increase will likely do so in the next few years. (Contains 1 figure and 2 footnotes.)