220,310 people (2024 Census estimate, +7.1% since 2020)
5,514 square miles of land · 40 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.
29 active community water systems list Yuma County in the area they serve, reporting 212,505 people served in all (a system that crosses county lines counts its whole population).
| CITY OF YUMA surface water · local government · AZ0414024 | 103,264 served |
| SAN LUIS CITY OF groundwater · local government · AZ0414005 | 39,705 served |
| FOOTHILLS WATER AND SEWER LLC surface water · private · AZ0414004 | 32,425 served |
| SOMERTON CITY OF groundwater · local government · AZ0414015 | 14,197 served |
| USMC YUMA MAIN SYSTEM surface water · federal · AZ0414082 | 8,353 served |
| ASPC YUMA groundwater · state · AZ0414099 | 4,197 served |
| WELLTON TOWN OF surface water · local government · AZ0414022 | 3,000 served |
| HOWARD CANTONMENT AREA groundwater · federal · AZ0414403 | 1,500 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 462 people were held in Yuma County's jail, in Vera's latest figure (2021), or 377 per 100,000 residents ages 15–64. In 2016 it was about 450.
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.
10 school districts have their office in Yuma County. School taxes are usually the largest part of a property tax bill.
Spent $170.9 million — $117.5 million to run schools, about $10,324 per student, plus $51.5 million on buildings and equipment. Money in: $37.7 million local (mostly property tax), $99.5 million state, $26.8 million federal. Long-term debt: $61.9 million.
Spent $99.8 million — $92.4 million to run schools, about $10,132 per student, plus $6.3 million on buildings and equipment. Money in: $19.1 million local (mostly property tax), $65.7 million state, $19.3 million federal. Long-term debt: $28.1 million.
Spent $68.1 million — $59.8 million to run schools, about $9,847 per student, plus $7.1 million on buildings and equipment. Money in: $7.3 million local (mostly property tax), $45.8 million state, $16.3 million federal. Long-term debt: $7.4 million.
Spent $56.3 million — $51.4 million to run schools, about $10,011 per student, plus $4.6 million on buildings and equipment. Money in: $2.9 million local (mostly property tax), $40.4 million state, $19.6 million federal. Long-term debt: $6 million.
Spent $44.5 million — $33.2 million to run schools, about $11,539 per student, plus $11.1 million on buildings and equipment. Money in: $2.7 million local (mostly property tax), $28.7 million state, $13.3 million federal.
Spent $3.2 million — $3 million to run schools, about $15,010 per student, plus $129,000 on buildings and equipment. Money in: $1.9 million local (mostly property tax), $442,000 state, $994,000 federal.
Spent $9.6 million — $2.7 million to run schools, about $16,613 per student, plus $6.8 million on buildings and equipment. Money in: $997,000 local (mostly property tax), $8.6 million state, $604,000 federal. Long-term debt: $1.4 million.
Spent $2.6 million — $2.3 million to run schools, about $14,865 per student, plus $283,000 on buildings and equipment. Money in: $685,000 local (mostly property tax), $1.1 million state, $1.1 million federal.
And 2 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: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Yuma County about $91.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
262 bridges in Yuma County: 133 in good condition, 123 fair, and 6 poor (2.3%). “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.
| I 8 EB over Colo R Pentntry Av SPTCO · built 1978 | 8,350 vehicles a day |
| IRR BIA RTE 31 over SOUTHERN PACIFIC RR · built 1965 | 3,550 vehicles a day |
| Local & Canal Serv over Main Outlet Drain Extens · built 1966 | 25 vehicles a day |
| O&M Crossover over Main Outlet Drain Extens · built 1966 | 20 vehicles a day |
| Pacific Ave./Count over Main Outlet Drain Extens · built 1966 | 20 vehicles a day |
| County 3rd Street over North Gila Canal · built 1936 | 20 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $59.9 million of work in Yuma County in fiscal 2025, about $294 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. Last day to register to vote: 2026-10-05. Early voting: 2026-10-07 to 2026-10-30. Last day to request a ballot by mail: 2026-10-23. Last suggested day to mail your ballot back: 2026-10-27. Election Day: 2026-11-03.
Source: Arizona Secretary of State, Sept. 4, 2026 · Arizona Secretary of State — 2025–2026 master elections calendar (PDF) · Arizona Secretary of State — election calendar
The budget, property tax rates, audits, local officials and offices for Yuma 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 Yuma County built: brayden.ozark@gmail.com.
More of Arizona: the state government and every county in Arizona.
Nearby counties: La Paz County (66 mi) · Imperial County, CA (86 mi) · Maricopa County (91 mi) · Pima County (131 mi) · Riverside County, CA (138 mi) · Pinal County (148 mi).