16,423 people (2024 Census estimate, −1.4% since 2020)
586 square miles of land · 28 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.
11 active community water systems list Iowa County in the area they serve, reporting 12,258 people served in all (a system that crosses county lines counts its whole population).
| WILLIAMSBURG PUBLIC WATER SUPPLY groundwater · local government · IA4884023 | 3,345 served |
| POWESHIEK WATER ASSOCIATION (IAC) groundwater · private · IA4868701 | 2,490 served |
| MARENGO WATER SUPPLY groundwater · local government · IA4843033 | 2,435 served |
| AMANA SOCIETY WATER SYSTEM NORTH groundwater · private · IA4848001 | 1,248 served |
| NORTH ENGLISH WATER DEPARTMENT groundwater · local government · IA4858070 | 1,065 served |
| VICTOR MUNICIPAL WATER DEPT groundwater · local government · IA4875050 | 875 served |
| SOUTH AMANA WATER SUPPLY groundwater · local government · IA4868034 | 300 served |
| LADORA WATER SUPPLY groundwater · local government · IA4840042 | 229 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 27 people were held in Iowa County's jail, in Vera's latest figure (2019), or 263 per 100,000 residents ages 15–64. In 2014 it was about 21.
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 Iowa County. School taxes are usually the largest part of a property tax bill.
Spent $18.1 million — $15.6 million to run schools, about $12,320 per student, plus $1.4 million on buildings and equipment. Money in: $9.5 million local (mostly property tax), $9.8 million state, $1.2 million federal. Long-term debt: $11.9 million.
Spent $8.2 million — $6.7 million to run schools, about $12,214 per student, plus $838,000 on buildings and equipment. Money in: $3.8 million local (mostly property tax), $4.5 million state, $633,000 federal. Long-term debt: $2.6 million.
Spent $7 million — $5.9 million to run schools, about $13,007 per student, plus $192,000 on buildings and equipment. Money in: $3.7 million local (mostly property tax), $4.2 million state, $767,000 federal. Long-term debt: $1.9 million.
Spent $6.4 million — $5.1 million to run schools, about $16,964 per student, plus $635,000 on buildings and equipment. Money in: $3.6 million local (mostly property tax), $2.6 million state, $454,000 federal. Long-term debt: $1.7 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 Iowa County about $11.1 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.
239 bridges in Iowa County: 90 in good condition, 104 fair, and 45 poor (18.8%). “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.
| M AVE over IOWA RIVER · built 1950 | 2,340 vehicles a day |
| FM over ENGLISH RIVER · built 1958 | 690 vehicles a day |
| FM over MIDDLE FK ENGLISH RIVER · built 1970 | 450 vehicles a day |
| FM over SMALL · built 1950 | 160 vehicles a day |
| LOCAL over MILLER CREEK · built 1900 | 110 vehicles a day |
| LOCAL over CONVEY CREEK · built 1920 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.1 million of work in Iowa County in fiscal 2025, about $65 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 Iowa 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 Iowa County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Poweshiek County (24 mi) · Johnson County (24 mi) · Keokuk County (25 mi) · Benton County (28 mi) · Washington County (30 mi) · Linn County (36 mi).