high schools?

which high school is the oldest and largest in california, county of los angeles, and in the country?

San Diego High School, located on the southern edge of Balboa Park, was established in 1882 by Joseph Russ. While Lowell High School (San Francisco), Sacramento High School, and Los Angeles High School are older in establishment, San Diego High School is the oldest high school in California still on the original site

Boston Latin School is the oldest public school in America with a continuous existence. It was founded April 23, 1635 by the Town of Boston.