Rancho Santa Margarita

The city of Rancho Santa Margarita is located in Orange County, California, United States. Rancho Santa Margarita, a master-planned community in Orange County, is one of the city's youngest residents. There were 47,853 residents at the 2010 census, up from 47,214 at the 2000 census. The city is named after Rancho Santa Margarita y Las Flores, which is in San Diego County, but it falls within Rancho Mission Viejo's boundaries. It is the longest city name in California at 20 characters.