Northridge, Los Angeles is a community located in the San Fernando Valley region of Los Angeles, California. Since the mid-1990s, it was widely believed to be the epicenter of the 1994 Northridge Earthquake. The actual location was in the community of Reseda, but the name stuck.
Since the episode Freak the Freak Out, Dan Schneider has put Northridge on the map again. Two people from the series, Christie and Bella, are shown to live in this area. Known locations include Parthenia Street, which is mentioned by Sinjin. Rex also went to the Northridge High School prom mentioned in Prom Wrecker. In the show, it is implied that girls from Northridge are good looking but "gold-diggers," meaning that they use guys to get money and goods, as seen in Freak the Freak Out when Rex says that he doesn't want to spend money on them, and Christie and Bella steal Robbie's wallet and Sinjin's watch.
There used to be a reality show that Rex watched called "The Real Girls of Nothridge" (see Parodies), but, much to Rex's dismay, it was cancelled. In iParty with Victorious, Kenan Thompson says that he wants to meet Northridge girls and he does. He also claims to be able to tell a Northridge girl just by her appearance, as well as their dance routines. Sinjin held his TV show in Northridge (see The Worst Couple).
In the episode Driving Tori Crazy, four Northridge girls ride with Tori and Beck. They flirt with Beck excessively (i.e. smelling his hair, offering to chew his gum for him) which annoys Tori, causing her to make fun of them. This results in one of the Northridge girls saying Tori doesn't "own" Beck, biting her elbow, and calling her a "grunch."