Sun Valley Midle School is located in Sun Valley, a section of Los Angeles, California, and is part of Los Angeles Unified School District (LAUSD). In April 1948, school officials announced that "the most charming of all the new junior high schools" in the Los Angeles system would be built in the Roscoe area. The "dream school", Sun Valley Junior High, was expected to be completed by September 1949. It did not open until February 1950.