This report includes data on: 23,213 public high schools in the continental United States and on 164 high schools in the outlying parts of the United States. The material was scoured from information blanks sent directly to the principals of the various high schools and returned by them. In some cases where replies were not received from the principals, data were obtained from records available in the files of State departments of education. The term "high school" as here used refers to junior, senior, junior-senior, undivided, and conventionally organized 4-year high schools. "Secondary grades" is used to denote the last 4 years of any public-school system which issues a high-school diploma on completion of the course. This is admittedly an arbitrary definition of secondary grades, but it is one which has been followed through a number of years in biennial surveys and it therefore appears best to retain it. By reference to the list of tables the reader will discover that the first table is in the nature of a summary and the last table a report on material equipment. The other tables divide into four groups, namely: (1) Classification of schools according to size (tables 2 to 4); (2) Enrollments by type of school, grade, sex, urban and rural, white and Negro (tables 5 to 40;); (3) Number of graduates and their continuance in school (tables 41 to 44); and (4) Number of staff members (tables 45 to 52). Many of the tables are for certain types of schools or are otherwise limited to some special group of schools or pupils. Those which contain figures for total as distinct from partial situations are the following: 1, 2, 6, 7, 10, 41, 45, and 53. (Contains 62 tables, 4 figures, and 1 footnote.) [Statistical tables in this bulletin were prepared by David T. Blose. Best copy available has been provided.]