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Riverside County, California (U.S.)

image by Daniel Rentería, 29 June 2025
based on photo located by Dave Fowler, 28 June 2025

Description of the flag
Seal
Previous flag
Riverside County Board of Supervisors

- indicates flag is known.
- indicates it is reported that there is no known flag.

Municipal flags in Riverside County:

Banning
Beaumont
Blythe
Calimesa
Canyon Lake
Cathedral City
Coachella
Corona
Desert Hot Springs
Eastvale

Hemet
Indian Wells
Indio
Jurupa Valley
Lake Elsinore
La Quinta
Menifee
Moreno Valley
Murrieta
Norco

Palm Desert
Palm Springs
Perris
Rancho Mirage
Riverside City
Rubidoux Village
San Jacinto
Temecula
Wildomar

See also:

Counties of California
Municipal flags of California (index page)
California
United States of America

Description of the flag

The county has apparently abandoned the flag with the outline of the county, and has adopted a seal flag.
Dave Fowler, 28 June 2025

I noticed this some time ago, but couldn't find any clear images. So no real manner of telling that it is a County Board Commission flag or a County flag outside the county building.

The flag was adopted in 2020, being first hoisted that year as can be seen on Google Street View. It depicts the county seal over a white field. The county seal has a blue ring, reading "COUNTY OF RIVERSIDE" at the top and "MAY 9, 1893" at the bottom, the date of its creation. In the center of the seal is the Riverside County Courthouse. Around it are 5 stars for the 5 supervisorial districts of the county.
Daniel Rentería, 29 June 2025

Seal

image located by Paul Bassinson, 27 December 2017

Image source: www.upnest.com
Paul Bassinson, 27 December 2017

Previous flag

image by Jens Pattke, 30 April 2001

A white flag with a map of California in grey bearing the name California in the north, and the county identified in dark blue, all overlain by an uncolored outline map of Riverside County, containing some buildings, a tree and a post with a bell in the west and a mound with palm trees and distant hills in the east, the name COUNTY of RIVERSIDE in the center, the date May 9, 1893 below the palm trees.

Riverside County Board of Supervisors

image by Zachary Harden, 7 November 2022

There is a flag used by the Riverside County Board of Supervisors, shown at https://rivco.org/board-supervisors. The main purpose of this body is to act as a county legislature and govern the affairs of the county with input from other officials and those that live and work in the county. The flag used by this body is their seal on a white background. There also appears to be a board chairman's flag to the right of the board flag.

I used the seal at https://www.discovercathedralcity.com to make the flag image.
Zachary Harden, 7 November 2022