Using U.S. Census data and the National Land Cover Dataset (NLCD), we mapped, analyzed and summarized the size and extent of the WUI in the lower 48 states for the year 2000. Our analysis reveals which communities, how many homes, and how much land lies within both intermix- and interface-type WUI. We also developed methods using historic housing density data to reconstruct the WUI over the past 6 decades and to project the future location and extent of the WUI. These methods have been successfully applied in the North Central region and WUI projections for other regions are scheduled for upcoming years. In this presentation we will display our results using national, regional, and multi-county maps and summary statistics. We will discuss forecasting, sensitivity analysis, and future research plans, and the implications of WUI dynamics for the future of this critical area.