Most high school sophomores are 15–16 years old , and most college sophomores are 19–20 years old in the U.S.

Quick Scoop: How Old Are Sophomores?

High school sophomores (10th grade)

  • Usually in 10th grade, the second year of high school.
  • Typical age range: 15–16 years old (start the year at 15, turn 16 during the school year in many cases).
  • Small variations happen if a student started school early/late, skipped a grade, or was held back.

College sophomores (2nd year of college)

  • Second year of a 4‑year college or university program.
  • Typical age range: 19–20 years old (often 18 turning 19, or 19 turning 20, depending on birthdays and gap years).

Extra context

  • “Sophomore” is used for the second year after freshman, both in high school and college in the U.S.
  • In high school, sophomores are usually still considered underclassmen ; juniors and seniors are “upperclassmen.”

So if you see “sophomore” with no other context:

  • In a high school convo, think 15–16.
  • In a college convo, think 19–20.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.