riversideca.gov Riverside is a city in Riverside County, California, United States, and the county seat of the eponymous county. Named for its location beside the Santa Ana River, it is the largest city in the Riverside-San Bernardino-Ontario metropolitan area of Southern California, 4th largest inland California city after Fresno, Sacramento, and Bakersfield, and is located approximately 60 miles (97 km) east of Los Angeles. Riverside is the 61st most populous city in the United States and 12th most populous city in California. As of the 2010 Census, Riverside had a population of 303,871. The city spans 81 square miles (210 km2). Riverside was founded in the early 1870s and is the birthplace of the California citrus industry as well as home of the Mission Inn, the largest Mission Revival Style building in the United States. It is also home to the Riverside National Cemetery. The University of California, Riverside is located in the northeastern part of the city. The university also hosts the Riverside Sports Complex. Other attractions in Riverside include the Fox Performing Arts Center, Riverside Metropolitan Museum, which houses exhibits and artifacts of local history, the California Museum of Photography, the California Citrus State Historic Park, and the Parent Washington Navel Orange Tree, one of the two original navel orange trees in California.