This policy research brief summarizes findings of a multistate assessment of postschool outcomes and community adjustment for young adults with severe disabilities, the National Transition Study of Individuals with Severe Disabilities Leaving School. The study was intended to provide policy-relevant information on the postschool outcomes and community adjustment of this population and document the difficulties these individuals encounter in accessing community services. The study sample consisted of 398 young adults with severe disabilities across five states (Colorado, Illinois, Massachusetts, Minnesota, and Texas). The subjects had been out of high school from 1 to 4 years. Data collection instruments included a 100-item post-school outcome survey and the Inventory for Client and Agency Planning. Results are reported for the following nine outcome domains: (1) school experiences/completion, (2) employment and daytime activities, (3) living arrangements, (4) family and friends, (5) community involvement, (6) financial independence, (7) personal choice, (8) family needs and support, and (9) waiting for services. Overall, findings illustrated a pattern of limited access to postsecondary education programs, employment instability, dependence on others for residence and other forms of support, limited participation in community social events, and significant levels of social isolation among these young adults. (Contains 27 references and lists 13 related publications.) (DB)