24,304 people (2024 Census estimate, −1.9% since 2020)
692 square miles of land · 35 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.
7 active community water systems list Audrain County in the area they serve, reporting 28,422 people served in all (a system that crosses county lines counts its whole population).
| MO AMERICAN MEXICO groundwater · private · MO2010519 | 13,000 served |
| MONROE COUNTY PWSD 2 buys surface water · local government · MO2024402 | 6,700 served |
| AUDRAIN COUNTY CONSOLIDATED PWSD 2 groundwater · local government · MO2024014 | 4,062 served |
| VANDALIA PWS surface water · local government · MO2010812 | 3,140 served |
| MARTINSBURG PWS groundwater · local government · MO2010506 | 559 served |
| LADDONIA PWS buys surface water · local government · MO2010438 | 511 served |
| FARBER PWS buys surface water · local government · MO2010268 | 450 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 45 people were held in Audrain County's jail, in Vera's latest figure (2022), or 295 per 100,000 residents ages 15–64. In 2017 it was about 69.
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.
3 school districts have their office in Audrain County. School taxes are usually the largest part of a property tax bill.
Spent $31.2 million — $28.5 million to run schools, about $11,582 per student, plus $1.5 million on buildings and equipment. Money in: $15.7 million local (mostly property tax), $12.8 million state, $5.2 million federal. Long-term debt: $17.2 million.
Spent $8.8 million — $6.9 million to run schools, about $11,875 per student, plus $1.7 million on buildings and equipment. Money in: $4.4 million local (mostly property tax), $3.4 million state, $1.5 million federal. Long-term debt: $3.8 million.
Spent $4.7 million — $4.2 million to run schools, about $13,408 per student, plus $247,000 on buildings and equipment. Money in: $2.8 million local (mostly property tax), $1.8 million state, $1.2 million federal. Long-term debt: $3 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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Audrain County about $13.2 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
315 bridges in Audrain County: 133 in good condition, 169 fair, and 13 poor (4.1%). “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.
| US 54 W over BEAVER DAM CR · built 1927 | 5,433 vehicles a day |
| MO 22 E over SALING BR · built 1930 | 3,488 vehicles a day |
| MO 22 E over KCS RR · built 1936 | 3,488 vehicles a day |
| MO 22 E over YOUNGS CR · built 1953 | 3,002 vehicles a day |
| MO 151 S over GOODWATER BR · built 1930 | 1,259 vehicles a day |
| POLLOCK RD over S FK OF SALT RVR · built 1966 | 500 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $21.9 million of work in Audrain County in fiscal 2025, about $878 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 Missouri 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 Audrain 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 Audrain County built: brayden.ozark@gmail.com.
More of Missouri: the state government and every county in Missouri.
Nearby counties: Monroe County (21 mi) · Callaway County (26 mi) · Montgomery County (28 mi) · Ralls County (29 mi) · Boone County (29 mi) · Pike County (37 mi).