Northridge is a neighborhood in the city of Los Angeles, California, in the San Fernando Valley. It is the home of California State University, Northridge, as well as eleven public and eight private schools. The settled community, originally named Zelzah, was renamed North Los Angeles in 1929. However, this change created confusion with nearby North Hollywood. At the suggestion of a civic leader, the community was renamed Northridge in 1938.
The Northridge area can trace its history back to the Gabrielino (or Tongva) people and to Spanish explorers. It was sold by the Mexican governor to Eulogio F. de Celis, whose heirs divided it for resale.
The 2000 U.S. census counted 57,561 residents in the 9.47-square-mile (24.5 km2) Northridge neighborhood—or 6,080 people per square mile (2,350/km2), among the lowest population densities for the city. In 2008, the city estimated that the population had increased to 61,993. In 2000 the median age for residents was 32, about average for city and county neighborhoods; the percentage of residents aged 19 to 34 was among the county's highest.
The neighborhood was considered "highly diverse" ethnically within Los Angeles, with a high percentage of Asian people for the county.