This study explores the differences among California's counties and regions in their needs for new school-site administrators in the coming decade, as driven by a combination of projected administrator retirements and projected student enrollment changes. The projected need for new school-site administrators, based solely on these combined factors, ranges from 9 percent to 71 percent of counties' 2007/08 administrator workforce, with the highest need counties generally in the Central Valley and Inland Empire regions. Specifically, using existing quantitative data, this study investigated three research questions concerning the labor market for California school-site administrators over the next decade: (1) How does projected retirement of school-site administrators vary at the county level? (2) How does projected demand for school-site administrators, based on projected changes in student enrollment, vary at the county level? (3) Assuming that other factors remain unchanged, how will changes in projected retirement rates and student enrollment intersect in particular counties to produce differential needs for school-site administrators? Appended are: (1) Data and analysis; and (2) Supplementary data tables. (Contains 4 boxes, 6 figures, 4 maps, 10 tables, and 15 notes.)