23,963 people (2024 Census estimate, +1.0% since 2020)
763 square miles of land · 31 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.
15 active community water systems list Iowa County in the area they serve, reporting 13,529 people served in all (a system that crosses county lines counts its whole population).
| DODGEVILLE WATERWORKS groundwater · local government · WI1250079 | 4,583 served |
| MINERAL POINT WATERWORKS groundwater · local government · WI1250084 | 2,487 served |
| BARNEVELD WATERWORKS groundwater · local government · WI1250075 | 1,258 served |
| ARENA WATERWORKS groundwater · local government · WI1250073 | 877 served |
| HIGHLAND WATERWORKS groundwater · local government · WI1250080 | 842 served |
| RIDGEWAY WATERWORKS groundwater · local government · WI1250087 | 690 served |
| LINDEN WATERWORKS groundwater · local government · WI1250082 | 547 served |
| AVOCA WATERWORKS groundwater · local government · WI1250074 | 545 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 55 people were held in Iowa County's jail, in Vera's latest figure (2025). In 2020 it was about 19.
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.
5 school districts have their office in Iowa County. School taxes are usually the largest part of a property tax bill.
Spent $22.5 million — $17.5 million to run schools, about $16,413 per student, plus $2.6 million on buildings and equipment. Money in: $8.2 million local (mostly property tax), $11 million state, $2.2 million federal. Long-term debt: $25.5 million.
Spent $13.8 million — $12.6 million to run schools, about $16,241 per student, plus $322,000 on buildings and equipment. Money in: $5.5 million local (mostly property tax), $8.2 million state, $1.8 million federal. Long-term debt: $11.3 million.
Spent $12.4 million — $11.1 million to run schools, about $16,453 per student, plus $225,000 on buildings and equipment. Money in: $3.1 million local (mostly property tax), $7.9 million state, $1.4 million federal. Long-term debt: $164,000.
Spent $7.8 million — $6.8 million to run schools, about $15,747 per student, plus $190,000 on buildings and equipment. Money in: $3.8 million local (mostly property tax), $4.4 million state, $910,000 federal. Long-term debt: $14.9 million.
Spent $5.4 million — $4.8 million to run schools, about $16,712 per student, plus $20,000 on buildings and equipment. Money in: $1.6 million local (mostly property tax), $3.8 million state, $627,000 federal. Long-term debt: $1.1 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 $10.8 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.
209 bridges in Iowa County: 140 in good condition, 58 fair, and 11 poor (5.3%). “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.
| CTH A over PECATONICA RIVER · built 1939 | 650 vehicles a day |
| CTH HH over WHITE HOLLOW CREEK · built 1948 | 400 vehicles a day |
| CTH E over E PECATONICA RIVER · built 1940 | 350 vehicles a day |
| CTH T over JONES CREEK · built 1974 | 340 vehicles a day |
| CTH G over PECATONICA RIVER · built 1973 | 327 vehicles a day |
| CTH KK over W BR BLUE MOUNDS CREEK · built 1972 | 315 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $8.9 million of work in Iowa County in fiscal 2025, about $376 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 Wisconsin 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 Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Lafayette County (24 mi) · Grant County (30 mi) · Richland County (30 mi) · Sauk County (31 mi) · Green County (35 mi) · Dane County (36 mi).