what county is moreno valley,ca
Moreno Valley, CA. Moreno Valley is a city located in Riverside County, California. A relatively young city, its rapid growth in the 1980s and the first decade of the 21st century made it second-largest city in Riverside County by population, and one of the Inland Empire's population centers. As of the 2010 census, the city's population was 193,365. Neighboring Riverside, California is the county seat and largest city in the county and the two cities are closely tied. Located just north of Lake Perris, Moreno Valley shares March Joint Air Reserve Base with both Riverside, California and the city of Perris.