Moreno Valley is a city in Riverside County, California, United States, and is part of the Riverside–San Bernardino–Ontario metropolitan area. It is the second-largest city in Riverside County by population and one of the Inland Empire's population centers. The city's population was 208,634 at the 2020 census. Moreno Valley is also part of the larger greater Los Angeles area. The city derived its name from the small community of Moreno, which became part of the city of Moreno Valley when the city was incorporated in 1984. Frank E. Brown, one of the founders of the community of Moreno in 1882, declined to have the town named after him, but to honor him, the town was named Moreno, Spanish for brown.