35,872 people (2024 Census estimate, −1.1% since 2020)
516 square miles of land · 70 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 Knox County in the area they serve, reporting 31,243 people served in all (a system that crosses county lines counts its whole population).
| VINCENNES WATER DEPARTMENT groundwater · local government · IN5242014 | 18,701 served |
| BICKNELL MUNICIPAL UTILITIES groundwater · local government · IN5242001 | 4,064 served |
| KNOX COUNTY WATER, INC. buys groundwater · local government · IN5242018 | 3,525 served |
| FREELANDVILLE WATER ASSOCIATION groundwater · private · IN5242006 | 1,175 served |
| OAKTOWN WATER WORKS groundwater · local government · IN5242009 | 832 served |
| MONROE CITY WATER UTILITIES groundwater · local government · IN5242008 | 813 served |
| EDWARDSPORT WATER UTILITY groundwater · local government · IN5242005 | 488 served |
| WHEATLAND WATER WORKS groundwater · local government · IN5242016 | 474 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 272 people were held in Knox County's jail, in Vera's latest figure (2024), or 1,195 per 100,000 residents ages 15–64. In 2019 it was about 288.
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 Knox County. School taxes are usually the largest part of a property tax bill.
Spent $45.4 million — $32.9 million to run schools, about $11,586 per student, plus $10.1 million on buildings and equipment. Money in: $11.5 million local (mostly property tax), $26.8 million state, $9.5 million federal. Long-term debt: $50.5 million.
Spent $18.1 million — $15.1 million to run schools, about $12,120 per student, plus $2.1 million on buildings and equipment. Money in: $6.2 million local (mostly property tax), $10.8 million state, $1.1 million federal. Long-term debt: $12.2 million.
Spent $17.5 million — $15.7 million to run schools, about $13,033 per student, plus $1.3 million on buildings and equipment. Money in: $5.3 million local (mostly property tax), $11.4 million state, $2.4 million federal. Long-term debt: $15.4 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 Knox County about $18.8 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.
290 bridges in Knox County: 117 in good condition, 160 fair, and 13 poor (4.5%). “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.
| TR 257 over WABASH RIVER · built 1906 | 750 vehicles a day |
| NIMNICHT ROAD over NIMNICHT CREEK · built 1995 | 170 vehicles a day |
| SAND ROAD over BLACK CREEK · built 1920 | 153 vehicles a day |
| WATSON ROAD over BRANCH OF MARIAH CREEK · built 1925 | 141 vehicles a day |
| HARTLEY ROAD over BRANCH OF WHITE RIVER · built 1990 | 110 vehicles a day |
| LUCKY POINT ROAD over KESSINGER DITCH · built 1995 | 110 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $18.8 million of work in Knox County in fiscal 2025, about $519 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 Knox 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 Knox County built: brayden.ozark@gmail.com.
More of Indiana: the state government and every county in Indiana.
Nearby counties: Lawrence County, IL (17 mi) · Daviess County (19 mi) · Pike County (22 mi) · Gibson County (27 mi) · Sullivan County (28 mi) · Wabash County, IL (28 mi).