Las Flores is an unincorporated census-designated place in Orange County, California, located adjacent to the City of Rancho Santa Margarita, California. The population was 5,971 at the 2010 census, up from 5,625 at the 2000 census. Las Flores does not have its own ZIP Code and is served by the same ZIP Code as adjacent Rancho Santa Margarita, 92688.