Rizal High School

Rizal High School (Filipino: Mataas na Paaralang Rizal), or commonly known as RHS, an institution of secondary education based in Pasig, Metro Manila, Philippines, has been listed as the "most populated secondary school in the world" since 1993 by the Guinness Book of World Records until 2005 when City Montessori School in Lucknow, India held the title of the world's most populated school, when it had 29,212 pupils, beating Rizal High School in Pasig, Philippines, which had 19,738 pupils.

The school was named after the Philippine national hero, Dr. Jose P. Rizal. Notable graduates of the institution include former Senate presidents Neptali Gonzales and Senator Jovito Salonga, former Senator Rene Saguisag, Maestro Lucio San Pedro, and National Artist Carlos "Botong" Francisco to mention a few.