The Museum of Riverside is a museum of regional history and culture, Indigenous culture, and natural history located in the historic Mission Inn District of Riverside, California, United States. The museum, formerly known as the Riverside Metropolitan Museum and Riverside Municipal Museum, is a department of the City of Riverside, but is supported by the Riverside Museum Associates (RMA) and the Harada House Foundation (HHF), two independent 501(c)(3) nonprofit organizations. Its mission is: "As a center for learning, the Museum of Riverside interacts with the community to collect, preserve, explore, and interpret the cultural and natural history of Riverside and its region."

Riverside is a city in and the county seat of Riverside County, California, United States, in the Inland Empire metropolitan area. It is named for its location beside the Santa Ana River. It is the most populous city in the Inland Empire and in Riverside County, and is about 50 miles (80 km) southeast of downtown Los Angeles. It is also part of the Greater Los Angeles area. Riverside is the 59th-most-populous city in the United States and the 12th-most-populous city in California. As of the 2020 census, it had a population of 314,998. Along with San Bernardino, Riverside is a principal city in the nation's 13th-largest Metropolitan Statistical Area (MSA); the Riverside-San Bernardino-Ontario MSA ranks in population just below San Francisco (4,749,008) and above Detroit (4,392,041).