This Supply and Demand report provides new information about parents and their current preschool choices and arrangements, as well as their preferences. Through the use of this report, policy makers can begin to understand the value that parents put on preschool education, including those who are not currently using child care or preschool programs. The report helps refine the assessment of available preschool spaces by providing information about targeted enrollment of three and four year olds and identifies gaps in the early care and education community in the County. This summary presents key findings from the Supply and Demand study. (author abstract)