History Of Riverside County:

Riverside County was created in 1893 from parts of San Bernardino and San Diego Counties.

The county derives its name from the City of Riverside California, christened when the upper canal of the Santa Ana River reached it in 1871.

The county's population surpassed one million people in 1980 when the current trend of high population growth as a major real estate destination began in the 1970s.

  At roughly 180 miles (290 km) wide in the east-west dimension, the area of Riverside County is massive. County government documents frequently cite the Colorado River town of Blythe as being a "three-hour drive" from the county seat, Riverside.  Some view the areas west of San Gorgonio Pass as the Inland Empire portion of the county and the eastern part as either the Mojave Desert or Colorado Desert portion. There are probably at least three geomorphic provinces: the Inland Empire western portion, the Santa Rosa Mountains communities, and the desert region. Other possible subdivisions include tribal lands, the Colorado River communities, and the Salton Sink.

County government projections expect the county's population to roughly double between 2004 and 2040. Most of the growth is expected in communities viewed as being within practical commute distances of work in Los Angeles and Orange Counties.

 area of Southern California is made up of :