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.
Corona, originally named South Riverside, was founded at the height of the Southern California citrus boom in 1886, and is advantageously situated at the upper end of the Santa Ana River Canyon, a significant pass through the Santa Ana Mountains. The town of Corona was once the “Lemon Capital of the World”. A museum there presents the lemon’s former role in the local economy. The city derived its name (and its nickname, “The Circle City”) from the curious layout of its streets, with a standard grid enclosed by the circular Grand Boulevard, 2.75 miles (4.43 kilometers) in circumference. The street layout was designed by Hiram Clay Kellogg, a civil engineer from Anaheim who was an influential figure in the early development of Orange County.