La Plata High School is part of the Charles County Public Schools and is located in La Plata, Maryland, United States. The current school was built in 1979. Before that, it was in the building (built in 1964) which now holds Milton M. Somers Middle School.
On November 9, 1926, the La Plata Elementary School was destroyed by a tornado that killed 13 students. That two room building was replaced by a new school that housed both an elementary and high school for La Plata.
In 1969, African American students protested racial injustice in the school after the school did not allow African Americans to become majorettes. Students organized a sit-in and a walk-out, and were punished by not being given their diplomas during graduation. The students received their diplomas in 2021 after a special ceremony.
As of 2025, La Plata High School has an enrollment of 1,217 students with a demographic profile of 52.67% White, 26.79% Black, 2.55% Asian or Pacific Islander 9.37% Hispanic, 0.33% American Indian, and 7.89% Other Races.