2,529,933 people (2024 Census estimate, +4.3% since 2020)
7,209 square miles of land · 351 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
94 active community water systems list Riverside County in the area they serve, reporting 2,587,923 people served in all (a system that crosses county lines counts its whole population).
| EASTERN MUNICIPAL WD buys surface water · local government · CA3310009 | 659,923 served |
| RIVERSIDE, CITY OF groundwater (surface-influenced) · local government · CA3310031 | 302,776 served |
| COACHELLA VWD: COVE COMMUNITY groundwater · local government · CA3310001 | 270,000 served |
| ELSINORE VALLEY MWD surface water · local government · CA3310012 | 169,455 served |
| CORONA, CITY OF buys surface water · local government · CA3310037 | 169,380 served |
| RANCHO CALIFORNIA WATER DISTRICT buys surface water · local government · CA3310038 | 146,147 served |
| JURUPA COMMUNITY SD buys surface water · local government · CA3310021 | 134,638 served |
| INDIO WATER AUTHORITY groundwater · local government · CA3310020 | 89,137 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 3,755 people were held in Riverside County's jail, in Vera's latest figure (2025). In 2020 it was about 3,561.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
24 school districts have their office in Riverside County. School taxes are usually the largest part of a property tax bill.
Spent $839.9 million — $773 million to run schools, about $15,219 per student, plus $35.5 million on buildings and equipment. Money in: $256.6 million local (mostly property tax), $767.8 million state, $72.2 million federal. Long-term debt: $610 million.
Spent $743.3 million — $669.7 million to run schools, about $16,986 per student, plus $56.1 million on buildings and equipment. Money in: $220.6 million local (mostly property tax), $600.1 million state, $85.7 million federal. Long-term debt: $324.4 million.
Spent $696.9 million — $585 million to run schools, about $18,481 per student, plus $93.4 million on buildings and equipment. Money in: $115.6 million local (mostly property tax), $573 million state, $79.8 million federal. Long-term debt: $256.6 million.
Spent $433.5 million — $375.9 million to run schools, about $14,165 per student, plus $45.7 million on buildings and equipment. Money in: $153.4 million local (mostly property tax), $306.1 million state, $29.8 million federal. Long-term debt: $175.4 million.
Spent $513.2 million — $450.3 million to run schools, about $17,070 per student, plus $42.6 million on buildings and equipment. Money in: $236.9 million local (mostly property tax), $357.1 million state, $52.8 million federal. Long-term debt: $438.6 million.
Spent $492.5 million — $419.3 million to run schools, about $18,743 per student, plus $62.9 million on buildings and equipment. Money in: $138.1 million local (mostly property tax), $370.1 million state, $63.4 million federal. Long-term debt: $269.5 million.
Spent $357.9 million — $335.8 million to run schools, about $15,012 per student, plus $7.9 million on buildings and equipment. Money in: $136.7 million local (mostly property tax), $256.4 million state, $32.9 million federal. Long-term debt: $207.1 million.
Spent $476.8 million — $437.6 million to run schools, about $20,808 per student, plus $23 million on buildings and equipment. Money in: $216 million local (mostly property tax), $349.2 million state, $60.9 million federal. Long-term debt: $451.7 million.
And 16 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Very High compared with other U.S. counties. FEMA estimates natural hazards cost Riverside County about $2.3 billion a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
1,120 bridges in Riverside County: 640 in good condition, 462 fair, and 18 poor (1.6%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| INTERSTATE 10 WB over THOUSAND PALMS WASH · built 1972 | 33,000 vehicles a day |
| INTERSTATE 10 EB over THOUSAND PALMS WASH · built 1972 | 33,000 vehicles a day |
| Route 74 over LAKE ELSINORE OUTLT CHNL · built 1994 | 29,580 vehicles a day |
| MONROE STREET over WHITEWATER RIVER · built 1972 | 22,400 vehicles a day |
| STATE ROUTE 86 SB over MEMEL DITCH · built 1989 | 15,300 vehicles a day |
| STATE ROUTE 86 NB over MEMEL DITCH · built 1979 | 15,300 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1 billion of work in Riverside County in fiscal 2025, about $425 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
General election: Tuesday, November 3, 2026. Ballots mailed; drop boxes open: 2026-10-05. Last day to register to vote: 2026-10-19. Early in-person voting: 2026-10-24 to 2026-11-03. Election Day: 2026-11-03. Last day for mailed ballots to arrive: 2026-11-10.
Source: California Secretary of State — Nov. 3, 2026 key dates · California Official Voter Information Guide — dates to remember · California Secretary of State — make a plan to vote
The budget, property tax rates, audits, local officials and offices for Riverside County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Riverside County built: brayden.ozark@gmail.com.
More of California: the state government and every county in California.
Nearby counties: Imperial County (60 mi) · San Diego County (66 mi) · San Bernardino County (78 mi) · Orange County (102 mi) · La Paz County, AZ (113 mi) · Los Angeles County (134 mi).