5,562 people (2024 Census estimate, −2.1% since 2020)
443 square miles of land · 13 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.
4 active community water systems list Audubon County in the area they serve, reporting 3,247 people served in all (a system that crosses county lines counts its whole population).
| AUDUBON WATER SUPPLY groundwater · local government · IA0505077 | 2,053 served |
| EXIRA WATER DEPT buys groundwater · local government · IA0520030 | 764 served |
| KIMBALLTON UTILITIES groundwater · local government · IA0543031 | 287 served |
| BRAYTON WATER SYSTEM buys groundwater · local government · IA0510040 | 143 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 13 people were held in Audubon County's jail, in Vera's latest figure (2019), or 393 per 100,000 residents ages 15–64. In 2014 it was about 4.
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.
1 school district has its office in Audubon County. School taxes are usually the largest part of a property tax bill.
Spent $14.3 million — $7 million to run schools, about $12,733 per student, plus $6.5 million on buildings and equipment. Money in: $5.2 million local (mostly property tax), $4.3 million state, $947,000 federal. Long-term debt: $14 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 Audubon County about $11.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
204 bridges in Audubon County: 71 in good condition, 96 fair, and 37 poor (18.1%). “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.
| EDGERTON ST over DRAINAGE · built 1960 | 616 vehicles a day |
| LOCAL over DRAINAGE · built 1945 | 226 vehicles a day |
| LOCAL over CREEK · built 1934 | 216 vehicles a day |
| LOCAL over ELKHORN CREEK · built 1973 | 62 vehicles a day |
| FM over CREEK · built 1920 | 60 vehicles a day |
| FM F-65 over CROOKED CREEK · built 1936 | 60 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $2.5 million of work in Audubon County in fiscal 2025, about $436 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 Audubon 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 Audubon County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Guthrie County (21 mi) · Shelby County (21 mi) · Cass County (24 mi) · Carroll County (25 mi) · Adair County (33 mi) · Crawford County (35 mi).