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Primary: June 2, 2026·Districts 2, 4, and 5 on the ballot·All three are incumbents seeking re-election
Riverside County is the fourth-largest county in California by population (~2.5 million residents) and one of the fastest-growing in the state. Its five-member Board of Supervisors controls a multi-billion-dollar budget, sets land-use policy over vast unincorporated areas, and approves major infrastructure, housing, and public health contracts across an area larger than Connecticut.
Three of the five supervisorial seats — Districts 2, 4, and 5 — are on the June 2, 2026 primary ballot. All three current holders are seeking re-election. District 4, representing the Coachella Valley, is held by Supervisor V. Manuel Perez, a former Assemblymember who has championed farmworker issues and desert community infrastructure. District 5, the San Jacinto Valley seat, is held by Yxstian Gutierrez, elected in 2022 when he unseated the Libertarian incumbent Jeff Hewitt. District 2, covering the western county including Corona and Eastvale, is held by Karen Spiegel, a Republican who has served since 2019.
Campaign finance data is tracked through the CTRIV NetFile portal — the Riverside County electronic filing system for local candidates. Supervisors file Form 460 with the Riverside County Registrar of Voters (not with CAL-ACCESS).
Total contributions raised per candidate · Source: FPPC Form 460 via CTRIV NetFile portal
District 2 covers the western portion of Riverside County including Corona, Norco, Eastvale, and surrounding unincorporated communities.
Incumbent — Re-election
Riverside County Supervisor since Jan 2019 · Former Riverside City Council member
Declared Challengers
Endorsed by Riverside County Democratic Party. Biographical details pending — no campaign website identified as of May 2026.
Data coverage: Tracked via the CTRIV NetFile portal (Riverside County Registrar of Voters). Supervisors file Form 460 locally — not with CAL-ACCESS.
District 4 covers the Coachella Valley and eastern Riverside County including Palm Springs, Palm Desert, Indio, Coachella, and Desert Hot Springs.
Incumbent — Re-election
Elected in 2024 — terms run through January 2029.
Elected Jan 2025. Former Assemblymember (AD-61). FPPC #1477158.
Supervisor since March 2015. FPPC ID not yet confirmed.
Verify exact dates at the Riverside County Registrar of Voters.
Groups active in Riverside County electoral and policy work.
Official source for candidate filing information, sample ballots, campaign finance records (CTRIV portal), and election results.
AFL-CIO central labor council for Riverside and San Bernardino counties. Coordinates union endorsements across Inland Empire races.
Primary news outlet covering the Coachella Valley (District 4). Tracks Perez and county politics affecting the eastern desert communities.
Primary newspaper of record for western Riverside County. Covers county supervisors, land-use decisions, and campaign finance.
Track Riverside County finance
Get notified when new candidates file Form 460 disclosures or when notable donation patterns are detected in Riverside County races.
Riverside County Supervisor since May 2017 · Former California Assemblymember (AD-56 and AD-42)
Declared Challengers
La Quinta City Councilmember (three terms, since 2016) · Marine Corps veteran (Operation Iraqi Freedom) · Commercial real estate agent. Campaign announced October 2025. FPPC #148476.
Data coverage: Tracked via the CTRIV NetFile portal (Riverside County Registrar of Voters). Supervisors file Form 460 locally — not with CAL-ACCESS.
District 5 covers the San Jacinto Valley and surrounding area including Moreno Valley, Perris, Hemet, San Jacinto, Beaumont, and Banning.
Incumbent — Re-election
Riverside County Supervisor since Dec 2022 · Former San Jacinto City Council member and Mayor
Declared Challengers
Effectively uncontested on the printed ballot. Two challengers — Eric Stalter and Lisa Matus — were disqualified from the ballot by court order after failing to meet nomination petition requirements. Both are pursuing write-in campaigns and legal appeals.
Data coverage: Tracked via the CTRIV NetFile portal (Riverside County Registrar of Voters). Supervisors file Form 460 locally — not with CAL-ACCESS.