The problem of this study was to examine the selection process used in the appointment of high school principals in the forty-eight large-city school districts of the nation. The purposes of this study were (1) to examine how principals of high schools in large-city districts are selected, and (2) to determine the criteria considered important in the selection process. In order to conduct this investigation a questionnaire was developed. The questionnaire was validated by a twelve-member panel composed of eleven public school administrators and a former United States Commissioner of Education. Significant findings which tend to be supported by the data are: 1. Human relations skills were considered as being most important in selecting principals. 2. Superintendents placed little value on the personal traits of candidates. 3. Instructional skills ranked third in importance. 4. The selection process depended heavily on biographical data and the use of the interview. 5. Teaching experience and a master's degree are essential. 6. Assistant superintendents are involved in the selection process more often than any other group, but superintendents are most influential in the selection process. 7. School facilities, pupils, and parents are seldom involved in the selection process, and when involved, their influence is minimal. 8. Very little use is made of rating scales and standardized tests. 9. In the selection process six items were identified as being very important and five items were identified as being of little value. 10. The instrument was able to isolate five categories that are present in the selection process, and fourteen items were identified as being the underlying factors in these five categories.