Corona is a city in Riverside County, California, United States. As of the 2010 census, the city had a population of 152,374, up from 124,966 at the 2000 census. The cities of Norco and Riverside lie to the northeast, Eastvale to the north, Chino Hills to the northwest, Yorba Linda, and the Cleveland National Forest and the Santa Ana Mountains to the southwest. Unincorporated areas of Riverside County line all of its other borders.