25,067 people (2024 Census estimate, −0.5% since 2020)
409 square miles of land · 61 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 Posey County in the area they serve, reporting 10,158 people served in all (a system that crosses county lines counts its whole population).
| MOUNT VERNON WATER WORKS surface water · local government · IN5265006 | 6,426 served |
| NEW HARMONY WATER UTILITY groundwater · local government · IN5265007 | 1,633 served |
| POSEYVILLE MUNICIPAL WATER DEPARTMENT groundwater · local government · IN5265008 | 1,400 served |
| CYNTHIANA WATER WORKS buys surface water · local government · IN5265004 | 699 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 121 people were held in Posey County's jail, in Vera's latest figure (2024), or 791 per 100,000 residents ages 15–64. In 2019 it was about 113.
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.
2 school districts have their office in Posey County. School taxes are usually the largest part of a property tax bill.
Spent $36.9 million — $30.9 million to run schools, about $14,708 per student, plus $3.7 million on buildings and equipment. Money in: $15.8 million local (mostly property tax), $20.4 million state, $3.2 million federal. Long-term debt: $10.1 million.
Spent $19.9 million — $17.6 million to run schools, about $12,244 per student, plus $1.8 million on buildings and equipment. Money in: $6.7 million local (mostly property tax), $13 million state, $1.8 million federal. Long-term debt: $12.8 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 Posey County about $16.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
207 bridges in Posey County: 95 in good condition, 100 fair, and 12 poor (5.8%). “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.
| I-64 EB over TR-422 & WABASH RV · built 1967 | 6,300 vehicles a day |
| I-64 WB over TR-422 & WABASH RV · built 1967 | 6,300 vehicles a day |
| SR 66 ILL SR 14 over WABASH RIVER & SERVICE R · built 1930 | 1,065 vehicles a day |
| Mulberry St over CSX Railroad · built 1960 | 628 vehicles a day |
| WILSEY RD over BLACK RIVER · built 1918 | 281 vehicles a day |
| Griffin Rd over Black River · built 1892 | 263 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $6.3 million of work in Posey County in fiscal 2025, about $248 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 Indiana 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 Posey 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 Posey County built: brayden.ozark@gmail.com.
More of Indiana: the state government and every county in Indiana.
Nearby counties: Vanderburgh County (15 mi) · White County, IL (17 mi) · Henderson County, KY (23 mi) · Gibson County (25 mi) · Union County, KY (26 mi) · Gallatin County, IL (26 mi).