The enrollment of high school students in postsecondary courses, called "dual enrollment," has grown dramatically in Kentucky in recent years, focusing attention on dual enrollment and its potential benefits. This study presents an overview of dual enrollment in Kentucky from the postsecondary perspective, examining dual enrollment course-taking and the matriculation and success of dual enrollment students in regular postsecondary study. The data used in this report are administrative data submitted by postsecondary institutions to the Council's Comprehensive Database between 2001 and 2005. Much of the study concerns the 16,995 students who dually enrolled in the 2003-04 school year, with additional time trend data and an analysis of the college entry cohort of 2002. This research report has examined the primary questions about dual enrollment from a postsecondary perspective. Does dual enrollment increase college participation after high school and does it enhance student success? On the whole, this study finds that dual enrollment did not enhance college matriculation. (Contains 31 tables and 5 figures.)