What is the oldest you can be in high school?
Elementary school is kindergarten through 5th grade (ages 5-10), middle school is grades 6-8 (ages 11-13), and high school is grades 9-12 (ages 14-18).
It's not uncommon. Some students started school later than others, often based on rules concerning their dates of birth.
In the U.S., you are only allowed into high school until you are 21, and once you're over that age, you will have to go to an adult high school. Many adults are unaware that the GED® test is not their only possibility of obtaining a high school diploma.
United States. The twelfth grade is the twelfth school year after kindergarten. It is also the last year of compulsory secondary education, or high school. Students are often 17–18 years old.
School leaving age
Children can leave school on the last Friday in June of the school year in which they reach 16 years of age. They must however do one of the following until they are 18: stay in full-time education, e.g. at a college. start an apprenticeship or traineeship.
Kearney attended San Marin High School in Novato, California, for one year, graduating at the age of six in 1990. In 1994, Kearney and his parents were on The Tonight Show.
"The World Health Organization defines adolescents as aged being 10 to 19 years, however there's been little research into the age of patients that pediatricians actually treat and how this varies across the world."
Not common, but not weird or unheard of. My older boys went to high school with a few guys that were 18–24 months older than them. One of my sons was almost 19 at graduation, so certainly there were 20 year olds in his class.
Age Requirements
Students must be able to meet high school graduation requirements prior to their 20th birthday. Age requirements for students with disabilities that have an active Individual Educational Plan (IEP) differ from the general school age requirements.
State | Age of required school attendance | Maximum age limit to which free education must be offered |
---|---|---|
North Carolina | 7 to 16 | 21 |
North Dakota | 7 to 16 | 21 |
Ohio | 6 to 18 | 22 |
Oklahoma | 5 to 18 | 21 |
Who is the oldest person to finish high school?
Lela Burden received an honorary high school diploma at the age of 111, which makes Burden the oldest high school graduate in the world. Burden originally attended Booker T. Washington High School in Norfolk, Virginia in 1918.
- Finish high school online. ...
- Get your GED or high school equivalency. ...
- Attend an in-person night school for adults. ...
- Research online high school diplomas. ...
- Make sure your school is accredited.

Students attending high school are around age 14 to 18. It starts with grade 9 and ends with grade 12. The classes are arranged by subjects. A student usually has different teachers throughout the day.