This study describes the timelines established by states for the processes of referral, assessment, eligibility determination, Individualized Education Program development, and placement of students with disabilities in special education. The purposes of the study, based on survey data from 50 states and the District of Columbia, were to summarize recent state policy and to identify areas in policy or practice that lead to variation in timelines across states. Findings indicate that the majority of states do not have separate timelines for each component in the process from referral to placement. For the timeline from referral to placement, 7 states had a total timeline of from 50 to 126 calendar days (median of 90) and 6 states had a total timeline of 40 to 75 school days (median of 53). Factors inherent in each phase of the process that can affect the length of the timelines are discussed. An appendix provides the timeline for each state. (JDD)