As of 2026-10-12, Liceo Nº 3 Dámaso Antonio Larrañaga tops the list with 5,000 students.
- #1 Liceo Nº 3 Dámaso Antonio Larrañaga — 5,000 students
secondary school in Montevideo, Uruguay
Liceo Dámaso Antonio Larrañaga, officially designated Liceo No. 3 of Montevideo, is a public secondary school in Montevideo, Uruguay. Located in the La Blanqueada neighbourhood, it is named after Uruguayan priest and botanist Dámaso Antonio Larrañaga, one of the founders of the National Library of Uruguay and the University of the Republic. The school provides education across all six years of secondary education and is among the largest secondary schools in Uruguay. Read more on Wikipedia.
Wikidata - #2 Haileybury College — 4,432 students
independent secondary college in Melbourne, Australia
Haileybury is an Australian private school with campuses in Keysborough, Brighton East, Berwick, Melbourne's CBD, Darwin, Northern Territory and online campus, Haileybury Pangea. It also has an international campus in the Tianjin outer district of Wuqing, China. Middle School at Haileybury introduces parallel education where students are separated into single-gender classrooms for their academic studies and for sport and camping programs. Although learning in separate classes, boys and girls... Read more on Wikipedia.
Wikidata - #3 Rangitoto College — 3,490 students
state secondary (year 9-15) school in Auckland, New Zealand
Rangitoto College is a state coeducational secondary school, located on the North Shore of Auckland, New Zealand. Serving years 9 to 13, Rangitoto has a school roll of 4,167 as of July 2026, making it the largest "brick-and-mortar" school in New Zealand. As of 20 April 2026, Greg Thornton is the school's principal. Read more on Wikipedia.
Wikidata - #4 Nyakrom Senior High Technical School — 3,320 students
mixed second cycle institution located in Nyakrom in the Central region of Ghana
source Wikidata - #5 Sirius College — 3,300 students
Independent non-denominational school in Melbourne, Victoria, Australia
Sirius College is a private school established in 1997. Based in Melbourne, Victoria, the school, which has over 3000 students, has campuses in Keysborough, Broadmeadows, Dallas, Sunshine West, and Shepparton. The college is a non-denominational school and accepts pupils from any ethnicity or religion. Read more on Wikipedia.
Wikidata - #6 Mount Albert Grammar School — 3,266 students
state secondary (year 9-15) school in Auckland, New Zealand
Mount Albert Grammar School, commonly known as MAGS, is a co-educational state secondary school in Mount Albert in Auckland, New Zealand. It teaches students in year levels 9 to 13. As of March 2026, Mount Albert Grammar School is the second largest school in New Zealand, behind Rangitoto College. Read more on Wikipedia.
Wikidata - #7 Goroka Secondary School — 3,076 students
school in Goroka, Eastern Highlands Province, Papua New Guinea
source Wikidata - #8 Macleans College — 2,784 students
state secondary (year 9-15) school in Auckland, New Zealand
Macleans College is a co-educational state secondary school located in Eastern Beach, Auckland, New Zealand. The school is named after the Scottish Maclean family who lived and farmed the land of the school and surrounding reserves, and the school emblem contains the castle from their family crest along with five waves which symbolise the seaside location of the school. Metro placed Macleans College as the number one Auckland high school in 2010 among those in the Cambridge International... Read more on Wikipedia.
Wikidata - #9 Avondale College — 2,765 students
state secondary (year 9-15) school in Auckland, New Zealand
Avondale College is a state coeducational secondary school located in the central Auckland, New Zealand, suburb of Avondale. With a roll of 2,789 students from years 9–13, it is the third largest secondary school in New Zealand. Read more on Wikipedia.
Wikidata - #10 Burnside High School — 2,760 students
state secondary (year 9-15) school in Christchurch, New Zealand
Burnside High School is a state co-educational secondary school located in the suburb of Burnside in Christchurch, New Zealand. With a roll of 2,724 students, it is the largest school in New Zealand outside Auckland, and is among the country's four largest schools. Read more on Wikipedia.
Wikidata