This report presents data on 1976-77 salaries paid to school principals and assistant principals in order to aid school officials in comparing salaries in their district with salaries in other districts of comparable enrollment size and per-pupil expenditure level. Data for the report were gathered through a survey of 1,060 public school districts throughout the United States. Section 1 presents mean and median figures for highest and lowest salaries paid, grouped into four categories according to school district enrollment. Section 2 presents mean and median figures for highest and lowest salaries paid, grouped into four categories according to per-pupil expenditure level. Section 3 presents comparative figures on the mean of highest salaries paid for the years 1974-75, 1975-76, and 1976-77, grouped into four categories according to school district enrollment. Within each section, data are presented separately for principals and assistant principals and are further separated into categories for elementary schools, junior high schools, and senior high schools. (JG)