Since 1989, the U.S. Bureau of the Census has conducted the biennial Private School Universe Survey (PSS) for the National Center for Education Statistics (NCES). The PSS is designed to generate biennial data on the total number of private schools, students, and teachers, and to build a universe of private schools in the 50 states and the District of Columbia to serve as a sampling frame of private schools for NCES sample surveys. The target population for the PSS is all schools in the 50 states and the District of Columbia that are not supported primarily by public funds, provide classroom instruction for one or more of grades kindergarten through 12 (or comparable ungraded levels), and have one or more teachers. Organizations or institutions that provide support for home schooling, but do not provide classroom instruction, are not included. The 2007-08 PSS data were collected between October 2007 and May 2008. All data are for the 2007-08 school year except the high school graduate data, which are for the 2006-07 school year. Due to first-time inclusion of both traditional and k-terminal schools, estimates in this report are not directly comparable to the estimates in the main tables sections of previous PSS release reports. The tables in this report contain totals and percentages generated from bivariate cross-tabulation procedures. All results are weighted. Comparisons drawn have been tested for statistical significance at the .05 level using Student t statistics. Many of the variables examined are related to one another, and complex interactions and relationships have not been explored. Characteristics such as school size, school level, religious orientation, association membership, geographic region, community type, and program emphasis are reported. Reported findings are descriptive in nature, are not meant to imply causality, and were selected to demonstrate the range of information available from the 2007-08 PSS rather than discuss all of the observed differences, emphasize any particular issue, or make comparisons over time. In the fall of 2007, there were 33,740 private elementary and secondary schools with 5,072,451 students and 456,266 full-time equivalent (FTE) teachers in the United States. Three appendices are included: (1) Glossary; (2) Technical Notes; and (3) Standard Error Tables. (Contains 1 footnote and 31 tables.) [For "Characteristics of Private Schools in the United States: Results from the 2003-2004 Private School Universe Survey," see ED492604.]