San Bernardino is a city located in the Inland Empire region of Southern California, United States. It serves as the county seat of San Bernardino County.
As of the 2020 census, the city had a population of 222,101, ranking it as the 18th-most populous city in California. It is a primary economic, cultural, and political hub for the San Bernardino Valley and shares this role with its twin city, Riverside, for the broader Inland Empire region.
The city is part of the Riverside–San Bernardino metropolitan area, which has a population of 4.74 million residents and ranks as the 12th-largest metropolitan area in the nation.