Riverside County is a massive, diverse landscape the size of the state of New Jersey.
In short: Spanning from the Los Angeles metropolitan area to the Arizona border, Riverside County is a sprawling region of 7,208 square miles. It is a land of sharp contrasts, shifting from Mediterranean chaparral in the west to rugged mountains and vast deserts in the east, home to millions of residents.
Formed in 1893 from parts of San Bernardino and San Diego counties, Riverside County was named for its seat, the city of Riverside, which sits near the Santa Ana River. Its history is deeply rooted in the traditional lands of Indigenous peoples, including the Cahuilla, Serrano, and Payómkawichum. During the 19th century, the landscape was transformed by Mexican land grants, such as Rancho Jurupa and Rancho San Jacinto Viejo, which established a foundation for the region's development before it became part of the United States.
Today, the county is a complex geopolitical entity. It is the fourth-most populous county in California, with over 2.4 million residents as of the 2020 census. The region has experienced rapid growth, driven by workers seeking affordable housing and the expansion of the Inland Empire. Despite its size and population, it remains a political outlier in Southern California. Historically a Republican stronghold, it has frequently stood apart from the state's broader Democratic trends, though local political shifts continue to reshape its electoral landscape.
The county's geography is as varied as its social fabric. It contains 19 official wilderness areas and significant portions of Joshua Tree National Park. This environmental diversity is matched by a unique legal history, particularly regarding Native American gaming. Following a landmark 1987 U.S. Supreme Court ruling in favor of the Morongo and Cabazon bands, the county became a focal point for the development of the Indian Gaming Regulatory Act of 1988. This decision fundamentally altered the economic and legal relationship between tribal nations and state governments across the country.
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Sources
- Summary by Intellect · source: Riverside County, California
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