Seoul National University High School is a public high school attached to Seoul National University located in Jongam-dong, Seongbuk-gu, Seoul.

The school was founded on September 1, 1946, as Seoul National University Middle School (서울대학교 사범대학 부속중학교), serving Grades 7 to 12.

It then split into a separate middle school and high school on September 1, 1951.

The school moved to its location at Jongam-dong on November 6, 1971, and changed its name to Seoul National University High School on March 1, 2001.

As of 5 February 2015[update], 25,741 students had graduated from the school.