This report draws on an array of nationally representative surveys and administrative datasets to present statistics on high school dropout and completion rates. The report includes estimates of the percentage of students who drop out in a given 12-month period (event dropout rates), the percentage of young people in a specified age range who are high school dropouts (status dropout rates), and the percentage of young people in a specified age range who hold high school credentials (status completion rates). In addition, the report includes data on the percentage of students who graduate within four years of starting ninth grade (adjusted cohort graduation rates) and an estimated on-time graduation rate used to examine long-term trends (averaged freshman graduation rate. This report updates a series of NCES reports on high school dropout and completion rates that began in 1988.