Hoërskool Marais Viljoen (English: Marais Viljoen High School) is a public Afrikaans medium co-educational high school situated in the city of Alberton in the Gauteng province of South Africa.

The school is named after former State President and MP for Alberton, Marais Viljoen.

Mr Fouché retired in 1989 and was replaced by Hannes le Roux from April 1989 to March 2004.

Marais Viljoen has since offered a technical, scientific and general study direction, with a broad choice of subjects.

Marais Viljoen High School has been performing very well on sports during the year.