Moreno Valley is a city in Riverside County, California 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. As of the 2020 census, ^[7] the city's population was 208,634. 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. ^[10]

According to the United States Census Bureau, the city has a total area of 51.5 square miles (133 km ²), of which, 51.3 square miles (133 km ²) of it is land and 0.2 square miles (0.52 km ²) of it is water.

Moreno Valley is located at a geographic crossroad. To the east lies the San Gorgonio Pass and Coachella Valley; to the south are Lake Perris, Perris, and the San Jacinto Mountains; to the north are the San Bernardino Valley and San Bernardino Mountains. To the west lies neighboring Riverside. It is relatively close to Ontario International Airport.

One of the most visible geographical features in Moreno Valley is Box Springs Mountain. This mountain at the northwest end of the city rises over the city, providing a concrete landmark. The section of the mountain that faces the city has a large letter "M" constructed upon it. This was built privately at the encouragement of the city council, which argued it would foster unity. The letter is located on public land and is maintained entirely by charity. The letter had lights installed on December 3, 2005 to celebrate Moreno Valley's 21st anniversary of its incorporation. The completion of the repairs of heavy damage to the letter, due to extreme rain the year before. The mayor at that time, Bonnie Flickinger, has said that the citizens liked it that way and that the council would try to get it to light up regularly. Between December 2, 2009 and December 6, 2009, Moreno Valley, along with Edison lit up the letter in celebration of the city's 25th anniversary. Several Eagle Scout projects have been dedicated to maintaining the "M".