Class of 2021
Born in 2003, started kindergarten in 2008, graduating high school in the spring of 2021.
Right now · 2026-27 school year
Graduated in 2021
That was 6 years before the end of the 2026-27 school year. A four-year degree started straight after would have finished in 2025.
Kindergarten started in 2008-09 and 12th grade falls in 2020-21.
Class of 2021, year by year
Every school year from kindergarten to graduation. A school year runs from the fall of the first calendar year to the spring of the second.
| Grade | School year | Typical age | Level |
|---|---|---|---|
| Kindergarten | 2008-09 | 5–6 | Elementary school |
| 1st Grade | 2009-10 | 6–7 | Elementary school |
| 2nd Grade | 2010-11 | 7–8 | Elementary school |
| 3rd Grade | 2011-12 | 8–9 | Elementary school |
| 4th Grade | 2012-13 | 9–10 | Elementary school |
| 5th Grade | 2013-14 | 10–11 | Elementary school |
| 6th Grade | 2014-15 | 11–12 | Middle school |
| 7th Grade | 2015-16 | 12–13 | Middle school |
| 8th Grade | 2016-17 | 13–14 | Middle school |
| 9th Grade (Freshman) | 2017-18 | 14–15 | High school |
| 10th Grade (Sophomore) | 2018-19 | 15–16 | High school |
| 11th Grade (Junior) | 2019-20 | 16–17 | High school |
| 12th Grade (Senior) | 2020-21 | 17–18 | High school |
Key dates for the Class of 2021
| Milestone | When |
|---|---|
| Started kindergarten | Fall 2008 |
| Started middle school (6th grade) | Fall 2014 |
| Started high school (9th grade) | Fall 2017 |
| Senior year | 2020-21 |
| High school graduation | Spring 2021 |
| Two-year associate degree | 2023 |
| Four-year college graduation | 2025 |
Who is in the Class of 2021?
A graduating class is not a single birth year. Most states require a child to have turned 5 by 1 September to start kindergarten that fall, so the Class of 2021 is split across two birth years.
Born January – August 2003
The majority of the class. They turned 5 before the cut-off and started kindergarten in the fall of 2008, turning 18 during senior year.
Born September – December 2002
Born a calendar year earlier but in the same class, because they missed the cut-off. They turn 18 the autumn before graduation.
How old is the Class of 2021?
Ages for the 2003 birth year, which is most of the class. Classmates born in late 2002 hit each milestone a year earlier on the calendar.
| Milestone | Age | Year |
|---|---|---|
| Starts kindergarten | 5 | 2008 |
| Starts middle school (6th grade) | 11 | 2014 |
| Starts high school (9th grade) | 14 | 2017 |
| Learner’s permit in most states | 15 | 2018 |
| Driving age in most states | 16 | 2019 |
| Graduates high school | 18 | 2021 |
| Legal adult, can vote | 18 | 2021 |
| Legal drinking age in the US | 21 | 2024 |
| Typical four-year college graduation | 22 | 2025 |
| 10-year high school reunion | 28 | 2031 |
| 20-year high school reunion | 38 | 2041 |
| Full US retirement age | 67 | 2070 |
If you did not graduate with your birth-year class
Skipping a grade, repeating one, or starting kindergarten late all move which class you graduate with. Here is where someone born in 2003 lands on each path.
| Path | Kindergarten | Graduating class | College |
|---|---|---|---|
| Standard progressionTurned 5 before the state cut-off and moved up a grade every year. | Fall 2008 | 2021 | 2025 |
| Late birthday (September–December)Missed the 1 September cut-off, so started kindergarten a year later. | Fall 2009 | 2022 | 2026 |
| Skipped a gradeAccelerated past one grade, finishing high school a year early. | Fall 2008 | 2020 | 2024 |
| Repeated a grade or delayed startHeld back a year, or started kindergarten late by choice (“redshirting”). | Fall 2009 | 2022 | 2026 |
| Gap year before collegeFinished high school on time and started college a year later. | Fall 2008 | 2021 | 2026 |
Reunion years
The Class of 2021 in other countries
English year groups run one number ahead of US grades at the same age, so the US Class of 2021 finishes Year 13 in 2021. Australia, Canada, and India use the same number as the US.
| US grade | School year | England & Wales | Australia | Canada | India |
|---|---|---|---|---|---|
| 9th Grade | 2017-18 | Year 10 | Year 9 | Grade 9 | Class 9 |
| 10th Grade | 2018-19 | Year 11 | Year 10 | Grade 10 | Class 10 |
| 11th Grade | 2019-20 | Year 12 | Year 11 | Grade 11 | Class 11 |
| 12th Grade | 2020-21 | Year 13 | Year 12 | Grade 12 | Class 12 |
The Class of 2021 is Generation Z
Born in 2003, which falls inside the 1997–2012 band for Generation Z. Pew Research Center definition.
Nearby graduating classes
Frequently Asked Questions
Most of the Class of 2021 was born in 2003. Anyone with a September to December birthday was born in 2002, because they missed the 1 September kindergarten cut-off and started school a year after their birth-year peers.
Kindergarten was the 2008-09 school year, starting in the fall of 2008. Count 13 school years — kindergarten plus grades 1 through 12 — and you land on graduation in the spring of 2021.
Graduated in 2021. That was 6 years before the end of the 2026-27 school year. A four-year degree started straight after would have finished in 2025.
They turn 18 during their senior year and are 24 in 2027 if they were born in 2003. Classmates born in late 2002 turn 25 that year.
The 10-year reunion falls in 2031, the 20-year in 2041, and the 25-year in 2046. Reunions are usually held in the same season as the original graduation.
9th grade was the 2017-18 school year. Schools that put 9th grade in a junior high instead start high school proper the following year.