This document summarizes the findings of the 2005 Miami Valley Open Space Assessment. It found that the Miami Valley region contains 2,268 open space facilities totaling 116,191 acres, or 6% of the regional land area. Since the previous 1993 assessment, open space acreage has increased by 15,000 acres (18.7%) while agricultural land has decreased by nearly 160,000 acres (10%). The report compares current open space data to the 1993 inventory and concludes with a vision for expanding the regional open space network going forward.