Tenth grade (also 10th Grade or Grade 10) is the tenth year of formal or compulsory education. It is typically the second year of high school. In some places, 10th Grade is the first year of high school. In many parts of the world, students in tenth grade are usually 15 to 16 years of age.

In the Australian states, Year 10 is the fourth year of a student's high school education. However, in the Northern Territory and other states, it is the first year of senior school, which occurs after high school. While in contrast, in most South Australian public schools, it is the third year of high school.

In Canada, the equivalent is Grade 10.

In Finland tenth grade is usually known as the first year of high School ("Lukio" in Finnish and "Gymnasiet" in Swedish). The tenth grade may also refer to an extra year of primary school ("kymppiluokka" in Finnish which literally translates to "tenth grade"). This extra year of primary school is for those without a post-primary school study position or who need some more time to decide on their future.

In New Zealand, Year 11 is the equivalent of tenth grade, with students aged 15 or 16 during the years. It is the third year of secondary school and the eleventh year of compulsory education. Year 11 is also the first year of the National Certificate of Educational Achievement (NCEA), the main national qualification for secondary school students in New Zealand. Students in Year 11 study English (or Te Reo Māori), mathematics, and a minimum of four elective subjects with a science subject highly recommended. Some schools also offer NCEA alternatives, like the International General Certificate of Secondary Education.

In the Philippines, Grade 10 or Senior Year (Filipino: Ikasampung Baitang), is the last year of Junior High School and the fourth year of High School curriculum. Students enrolled in Grade 10 are usually 15–16 years old. Student can also starts as young age education usually on female students than male students at the age of 1-15 years old. This is where they prepare to enter Senior High School.

It was formerly named as 4th Year or Year IV (Filipino: Ika-apat na Taon) and also the last year of the High School (Filipino: Mataas na Paaralan) stage as well as basic compulsory education in the country until the change to Grade 10 on June 1, 2015 upon the start of school year 2015-2016 due to the implementation process of the K-12 curriculum from May 20, 2008 and became effective on April 24, 2012 making the level now third to the last in High School under the current curriculum.

There is also the Citizen Army Training, a basic military education and training program similar to the Reserve Officers' Training Corps for college students. As in conscription and ROTC, the program is not mandatory.