National and regional student population projections and factors related to enrollment trends are provided in this report. Demographic data are presented on national and regional enrollment trends and projections, the national and regional school-age population, regional and state growth patterns, minority populations and immigration patterns, and birth and fertility trends and projections. Highlighted projections include the following: K-12 public and private school enrollment is projected to rise as high as 49,722,000 in 1998 before declining again; since reaching its height in 1976, 9-12 enrollment has been in a decline (the 1990 enrollment is projected to be 19.3% less than in 1976); minority enrollment increased in 38 of the 50 states between 1980 and 1986; and between 1990 and 2005, the number of yearly high school graduates will increase in the west, the south, and the northeast, and decrease in the midwest. The implications of such trends on the student population in the year 2000 are discussed. Seventeen charts and 33 tables are included. (56 references) (LMI)