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County · code 06065

Riverside CountyCalifornia

Riverside County is a county in California with its seat in Riverside. It was created in 1893 and has a population of 2,418,185 as of the 2020 census.

  • Founded1893
  • County seatRiverside
  • Named forRiverside
  • Land area7,209 sq mi + 94 sq mi water
  • Population2,418,185 2020 Census
  • Parcels mapped862,951 checked 14 October 2026
Open the free map Click any parcel in Riverside County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

ImperialSan DiegoSan BernardinoOrangeLa Paz, AZ Riverside Census outline · seat marked

Where it is

Riverside on the map of California

California has 58 counties and county equivalents, each with its own records office. Shapes with a page are links.

Alameda CountyAlpine CountyAmador CountyButte CountyCalaveras CountyColusa CountyContra Costa CountyDel Norte CountyEl Dorado CountyFresno CountyGlenn CountyHumboldt CountyImperial CountyInyo CountyKern CountyKings CountyLake CountyLassen CountyLos Angeles CountyMadera CountyMarin CountyMariposa CountyMendocino CountyMerced CountyModoc CountyMono CountyMonterey CountyNapa CountyNevada CountyOrange CountyPlacer CountyPlumas CountySacramento CountySan Benito CountySan Bernardino CountySan Diego CountySan Francisco CountySan Joaquin CountySan Luis Obispo CountySan Mateo CountySanta Barbara CountySanta Clara CountySanta Cruz CountyShasta CountySierra CountySiskiyou CountySolano CountySonoma CountyStanislaus CountySutter CountyTehama CountyTrinity CountyTulare CountyTuolumne CountyVentura CountyYolo CountyYuba CountyRiverside County Riverside
Counties of California · Riverside highlighted

History

Formed in 1893 from San Bernardino County and San Diego County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Riverside County was created on May 2, 1893, from parts of San Bernardino and San Diego Counties. The county exchanged boundary areas with San Bernardino in 1919 and with Orange County in 1988.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1893
    Riverside County created Riverside created from San Bernardino and San Diego. Act passed 11 March 1893; referendum for or against creation of new county held 2 May 1893.
    from San Bernardinofrom San Diego
    · Calif. Stats. 1893, 30th sess., ch. 142/pp. 158-168
  2. 1919
    Exchanged territory Riverside exchanged with San Bernardino.
    with San Bernardino
    · Calif. Stats. 1919, 43d sess., ch. 62/p. 99
  3. 1967
    Boundary clarified Riverside boundaries redefined to more precisely define the boundary between Riverside and the State of Arizona (no change).
    no change
    · Calif. Stats. 1967, reg. sess., ch. 340/pp. 1537-1539; Coy, 340
  4. 1988
    Exchanged territory Riverside exchanged small areas with Orange. Ordinance passed 27 September 1988; effective 8 November 1988.
    with Orange
    · Minutes of the Board of Supervisors, Riverside County, 27 September 1988, ordinance 665
  5. 1992
    Changed Boundary between Riverside and Orange restated (no change). Ordinance passed 26 November 1991; effective 1 July 1992.
    Orange
    · Minutes of the Board of Supervisors, Riverside County, 26 November 1991, ordinance 717
  6. 1993
    Boundary clarified Riverside boundaries redefined (no change).
    no change
    · Calif. Stats. 1993-1994, reg. sess., ch. 1195, sec. 5/pp. 6858-6860

Land and parcels

What the maps cover in Riverside

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Riverside by the Census

Population
2,418,185 2020 Census count
Housing units
848,549 2020 Census count
Land area
7,209 square miles
Water area
94 square miles
People per sq mi
335 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Riverside County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open Riverside County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Riverside County

When was Riverside County founded?
Riverside County was founded in 1893, formed from San Bernardino County and San Diego County, and named after Riverside.
What is the county seat of Riverside County?
The county seat of Riverside County is Riverside.
Is there an online parcel map for Riverside County?
Yes. A public source publishes a parcel map of 862,951 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Riverside County's boundary or name changed?
Riverside County was created in 1893 from San Bernardino County and San Diego County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Orange County and San Bernardino County.
Is my lot in a flood zone?
We do not have flood maps for Riverside County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door