Quick Answer
The national average high school GPA in the U.S. is approximately 3.0 on the unweighted 4.0 scale, though this varies by school and region.
Average GPA Context
National averages shift slowly over time as grading practices change, and they vary significantly between school districts, so treat any single number as a rough benchmark rather than a hard target. What matters more is how your GPA compares within your own school's grading culture and against the specific programs you're applying to.