Class of 2021: What Year Were They Born & How Old Are They?
Students in the Class of 2021 graduated 5 years ago. They were born in 2003 and are turning 23 in 2026.
Updated for the 2026–2027 school year
Age in 2026
23
years old (turning)
Started High School
2017
Fall semester
College Grad
2025
4-year degree
Class of 2021: K–12 journey
100%
The Class of 2021 has finished all 13 years of K–12.
Countdown to the 10-year reunion (summer 2031)
Most reunions are held in summer or early fall; dates are set by each class.
Class of 2021 Reunions
2031
10-Year Reunion
in 5 years
2046
25-Year Reunion
in 20 years
2071
50-Year Reunion
in 45 years
Academic Journey for the Class of 2021
Class of 2021: Grade by School Year
Every school year from kindergarten to senior year for the Class of 2021, on the standard US calendar (school years run late August to June).
Generation: Generation Z
Generation Z
1997–2012
Notable People in the Class of 2021
These well-known individuals share a graduation year of approximately 2021 based on their birth year.
Olivia Rodrigo
Grammy Award-Winning Singer
Born 2003 · Class of ~2021
JoJo Siwa
Dancer & Internet Personality
Born 2003 · Class of ~2021
The Kid LAROI
Singer & Rapper
Born 2003 · Class of ~2021
International Equivalent of Class of 2021
Born in 2003 and educated in a different country? Here is what your graduating class would be called.
United States
Class of 2021
Grade 12, High School Diploma
UK (England)
Year 13, 2021
A-Level / UCAS application year
Australia
Year 12, 2021
ATAR score — university entrance
India
Class 12, 2021
10+2 Board Exams (CBSE/ISC)
Alternative Graduation Timelines for Class of 2021
Not everyone follows the exact standard path. Here is how graduation shifts based on different academic scenarios.
Accelerated Path
Started school 1 year early
Standard Path
Standard path
Delayed by 1 Year
Repeated a grade or started late
Transfer Path
2-year community college transfer
Not on the standard US system?
Recalculate based on credits, a different country, or exact start dates.
High School Graduation Year Calculator for United States by Current Grade
Choose your current grade to calculate
Class of 2021: Frequently Asked Questions
What grade is the Class of 2021 in right now?
The Class of 2021 has already graduated from high school (Spring 2021).
How old is the Class of 2021?
Students in the Class of 2021 were mostly born in 2003 and are turning 23 in 2026.
What year was the Class of 2021 born?
Most students in the high school Class of 2021 were born in 2003 (those born September–December 2002 can also fall in this class, depending on the state cutoff).
When did the Class of 2021 start high school?
The Class of 2021 started high school as freshmen in Fall 2017 and entered kindergarten in Fall 2008.
When does the Class of 2021 graduate?
US high schools graduate between late May and mid-June, so the Class of 2021 graduates in Spring 2021.
When will the Class of 2021 graduate college?
On a standard 4-year degree starting straight after high school, the Class of 2021 graduates college in 2025.
When is the Class of 2021 10-year reunion?
The 10-year reunion for the Class of 2021 is in 2031, 5 years from now.
What generation is the Class of 2021?
The Class of 2021, born in 2003, belongs to Generation Z (1997–2012).