Twelve tables are presented, which provide enrollment and staffing data concerning the 100 largest school districts in the United States. The data were reported to the National Center for Education Statistics in the spring of 1989 through the Common Core of Data survey series, and files used for this report contain data for all 50 states, the District of Columbia, and 5 outlying areas. While they represent fewer than 1% of the nation's school districts, the 100 school districts are responsible for educating 8,788,448 students (approximately 22% of all public school students) and 40% of all minority students. Most of the 100 largest districts are located in coastal states. There is a tendency for these school districts to have larger schools and slightly higher pupil-to-teacher ratios than other districts. These 100 districts also employ about 21% of the nation's public school teachers. Two figures summarize overall data. An appendix lists the 500 largest districts in the United States in 1988-89. (SLD)