The Los Nietos School District (the oldest district in California) has acted as a school district under the laws of the State of California since August 12, 1861. In 1885, part of the district was made into the Pio Pico School District. In 1924, a school was built on the present site of the Los Nietos Middle School at 11425 East Rivera Road in Los Nietos, California. The building was condemned after the 1933 earthquake. When it was rebuilt, the floor plan was identical to the building that had been torn down but the structural design was changed from brick to stucco. Presently, the Los Nietos Elementary School District consists of four schools, three K-6 schools; Ada S. Nelson School and Aeolian School, both located in Whittier, Rancho Santa Gertrudes School in Santa Fe Springs, and one 7-8 middle school; Los Nietos Middle School.