Corona, fast-growing residential city, Riverside County, southern California; platted 1886, incorporated 1896. Manufacturing, construction, and office development are the principal contributors to the economy. Cleveland National Forest adjoins the city. The city's name, Latin for “circle,” is derived from its circular main street, the scene of annual automobile races during 1913-1916. Population 37,791 (1980); 76,095 (1990); 112,815 (1998 estimate).