The 1994 Northridge Earthquake is named for the community based on early estimates of the location of the quake's epicenter; however further refinements showed it to be technically in neighboring Reseda. The area was also heavily damaged in the 1971 Sylmar earthquake.
In 1994, the Northridge Little League Baseball team won the United States Little League Championship game, but lost the World Series game to the international team from Coquivacoa-Maracaibo, Venezuela.
The U.S. Metric Association is based in Northridge.
Northridge is 17 square miles (44 km2) in area and is approximately 807 feet (246 m) above sea level. Located within the San Fernando Valley, adjacent neighborhoods with Northridge include Granada Hills, Chatsworth, North Hills, Reseda, Porter Ranch, and Winnetka. Major streets in the area include Roscoe Boulevard, Devonshire Street, Nordhoff Street, Corbin Avenue, Tampa Avenue, and Reseda Boulevard. The Ronald Reagan Freeway (State Route 118) runs along the northern edge of Northridge, and provides access to the rest of the Los Angeles area freeway system. The area code is 818 and zip codes are 91324 through 91330.
Shortly after the Los Angeles City Aqueduct opened in 1913, Henry Hubbard became a member of Aqueduct Board. The following year Zelzah Grammar School opened and citizens formally voted for annexation to the City of Los Angeles and Owens River water rights in 1915. William Mulholland, engineer of the mammoth project, lived nearby and maintained one of many large rancho tracts remaining from the Spanish, Mexican and Californio land grant days.
Zelzah Acres became the name of one of those early housing tracts carved from the former enormous Rancho Ex-Mission San Fernando lands joining nearby towns of Chatsworth Park, Lankershim, Owensmouth, San Fernando and Van Nuys. The post office and train depot were renamed North Los Angeles in 1929 and finally Northridge in 1938.
As of the 2000 census, and according to the Los Angeles Almanac there were 68,469 people and 24,172 households residing in Northridge. The racial makeup of the neighborhood was 62.45% White, 14.89% Asian, 0.16% Pacific Islander, 5.14% African American, 0.47% Native American, 11.48% from other races, and 5.41% from two or more races. 24.77% of the population were Hispanic of any race.
Median household income in 2000 was $60,108.
In 2009, the Los Angeles Times's "Mapping L.A." project supplied these Northridge neighborhood statistics: population: 57,561; median household income: $67,906.