48,177 people (2024 Census estimate, −2.0% since 2020)
823 square miles of land · 59 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.
41 active community water systems list Henry County in the area they serve, reporting 38,677 people served in all (a system that crosses county lines counts its whole population).
| KEWANEE groundwater · local government · IL0730650 | 12,509 served |
| GENESEO groundwater · local government · IL0730500 | 6,539 served |
| COLONA WEST groundwater · local government · IL0730550 | 2,640 served |
| COLONA EAST groundwater · local government · IL0730400 | 2,501 served |
| GALVA groundwater · local government · IL0730450 | 2,449 served |
| CAMBRIDGE groundwater · local government · IL0730300 | 2,086 served |
| ORION groundwater · local government · IL0730700 | 1,754 served |
| ATKINSON groundwater · local government · IL0730200 | 955 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 102 people were held in Henry County's jail, in Vera's latest figure (2019), or 335 per 100,000 residents ages 15–64. In 2014 it was about 93.
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.
9 school districts have their office in Henry County. School taxes are usually the largest part of a property tax bill.
Spent $40.6 million — $32.7 million to run schools, about $13,282 per student, plus $3.5 million on buildings and equipment. Money in: $23.3 million local (mostly property tax), $15.5 million state, $3 million federal. Long-term debt: $33.9 million.
Spent $42.1 million — $26.6 million to run schools, about $13,515 per student, plus $12 million on buildings and equipment. Money in: $7 million local (mostly property tax), $23.8 million state, $9.4 million federal. Long-term debt: $9 million.
Spent $18.5 million — $12.9 million to run schools, about $12,917 per student, plus $4.7 million on buildings and equipment. Money in: $9.5 million local (mostly property tax), $6.4 million state, $978,000 federal. Long-term debt: $9 million.
Spent $9.4 million — $8 million to run schools, about $14,871 per student, plus $746,000 on buildings and equipment. Money in: $3.7 million local (mostly property tax), $5 million state, $1.3 million federal. Long-term debt: $5 million.
Spent $9.3 million — $7 million to run schools, about $14,522 per student, plus $1.5 million on buildings and equipment. Money in: $5 million local (mostly property tax), $3.6 million state, $1.8 million federal. Long-term debt: $1.3 million.
Spent $7.7 million — $7 million to run schools, about $15,245 per student, plus $159,000 on buildings and equipment. Money in: $4.5 million local (mostly property tax), $3.5 million state, $641,000 federal. Long-term debt: $1.9 million.
Spent $6.5 million — $5.2 million to run schools, about $13,869 per student, plus $862,000 on buildings and equipment. Money in: $2.2 million local (mostly property tax), $4 million state, $1.4 million federal. Long-term debt: $1 million.
Spent $8.2 million — $7.4 million to run schools, about $20,377 per student, plus $495,000 on buildings and equipment. Money in: $5.7 million local (mostly property tax), $3 million state, $667,000 federal. Long-term debt: $900,000.
And 1 more.
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 Henry County about $24.4 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.
329 bridges in Henry County: 154 in good condition, 133 fair, and 42 poor (12.8%). “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.
| FAI 80 SB over CLEVELAND RD/FAP595 · built 1965 | 10,800 vehicles a day |
| FAI 80 NB over CLEVELAND RD/FAU5864 · built 1965 | 10,800 vehicles a day |
| FAI 80 NB over FAI 74 · built 1961 | 10,750 vehicles a day |
| FAI 80 EB over MINERAL CREEK · built 1961 | 10,300 vehicles a day |
| FAI 80 WB over MINERAL CREEK · built 1961 | 10,300 vehicles a day |
| FAI 74 NB over CAMP CREEK · built 1968 | 7,400 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $30.1 million of work in Henry County in fiscal 2025, about $611 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 Illinois 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 Henry 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 Henry County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: Rock Island County (24 mi) · Stark County (25 mi) · Knox County (29 mi) · Whiteside County (30 mi) · Bureau County (31 mi) · Scott County, IA (32 mi).