Marshall High School beat out 63 schools in the Los Angeles Unified School District in the annual Academic Decathlon, district officials announced Thursday night.
Anastasya Lloyd-Damnjanovic was the highest-scoring individual student, with 8,933 points.
The decathlon tests students' knowledge in a variety of areas, including history. This year's focus was the French Revolution.
Marshall first won a national championship in 1987. Since then, the district has won 15 state and 10 national competitions.
West High School in Torrance won the Los Angeles County Academic Decathlon for the second year in a row, county officials announced Thursday.