High school seniors in the United States are typically 17 or 18 years old. This age range corresponds to students in the 12th grade, which is the final year of high school. Most students begin their senior year at age 17 and turn 18 either during the school year or by the time they graduate
. The exact age can vary depending on factors such as when a student started school, whether they skipped or repeated a grade, or the school's cutoff dates for enrollment. Some seniors may be as young as 16 or as old as 19, but 17-18 is the common range
. In summary:
- Typical age of high school seniors: 17–18 years old
- Possible age range: 16–19 years old depending on individual circumstances
- Grade level: 12th grade (senior year)
This reflects the standard progression through U.S. education, where students start kindergarten around age 5 or 6 and advance through 12 grades
