26,729 people (2024 Census estimate, +0.1% since 2020)
570 square miles of land · 47 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.
12 active community water systems list Boone County in the area they serve, reporting 32,446 people served in all (a system that crosses county lines counts its whole population).
| BOONE WATER WORKS groundwater (surface-influenced) · local government · IA0819033 | 12,704 served |
| XENIA RWD (NORTH) groundwater · private · IA9425701 | 6,122 served |
| XENIA RWD (BOONE) buys groundwater · private · IA0844006 | 4,975 served |
| MADRID WATER DEPARTMENT groundwater (surface-influenced) · local government · IA0848015 | 3,090 served |
| OGDEN MUNICIPAL UTILITIES groundwater · local government · IA0858090 | 2,419 served |
| XENIA RWD (MADRID) buys groundwater · private · IA0848701 | 1,635 served |
| WOODWARD RESOURCE CENTER buys surface water · state · IA0800923 | 700 served |
| COAL VALLEY WATER DISTRICT buys groundwater · private · IA0819303 | 240 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 40 people were held in Boone County's jail, in Vera's latest figure (2019), or 234 per 100,000 residents ages 15–64. In 2014 it was about 20.
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.
4 school districts have their office in Boone County. School taxes are usually the largest part of a property tax bill.
Spent $58.7 million — $25.1 million to run schools, about $12,410 per student, plus $30.2 million on buildings and equipment. Money in: $15.3 million local (mostly property tax), $19.3 million state, $3.2 million federal. Long-term debt: $45.5 million.
Spent $10.8 million — $9.1 million to run schools, about $12,036 per student, plus $939,000 on buildings and equipment. Money in: $7.2 million local (mostly property tax), $4.5 million state, $595,000 federal. Long-term debt: $13.6 million.
Spent $12.1 million — $8.7 million to run schools, about $12,694 per student, plus $2.7 million on buildings and equipment. Money in: $4.1 million local (mostly property tax), $6.2 million state, $540,000 federal. Long-term debt: $6.9 million.
Spent $6.9 million — $4.2 million to run schools, about $11,546 per student, plus $385,000 on buildings and equipment. Money in: $5.6 million local (mostly property tax), $2.3 million state, $343,000 federal. Long-term debt: $3.7 million.
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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Boone County about $16.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
134 bridges in Boone County: 38 in good condition, 58 fair, and 38 poor (28.4%). “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.
| FM over DES MOINES RIVER · built 1972 | 769 vehicles a day |
| FM over BLUFF CREEK · built 1957 | 718 vehicles a day |
| FM over DES MOINES RIVER · built 1955 | 709 vehicles a day |
| FM over TRIB. OF BEAVER CREEK · built 1948 | 279 vehicles a day |
| LOCAL over BIG CREEK · built 1900 | 90 vehicles a day |
| FM over DES MOINES RIVER · built 1909 | 80 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $12 million of work in Boone County in fiscal 2025, about $451 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.
Registration deadlines, early voting and polling places for Iowa are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Boone 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 Boone County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Greene County (23 mi) · Story County (24 mi) · Dallas County (25 mi) · Hamilton County (27 mi) · Webster County (30 mi) · Polk County (31 mi).