45,531 people (2024 Census estimate, +3.8% since 2020)
467 square miles of land · 98 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.
17 active community water systems list Madison County in the area they serve, reporting 31,807 people served in all (a system that crosses county lines counts its whole population).
| MID-OHIO WSD - CHRISMAN AVENUE WTP groundwater · local government · OH4900712 | 10,256 served |
| MID-OHIO WSD - OLD SPRINGFIELD ROAD WTP groundwater · local government · OH4901012 | 5,176 served |
| WEST JEFFERSON VILLAGE PWS groundwater · local government · OH4902012 | 4,488 served |
| MID-OHIO WSD - JACKSON STREET WTP groundwater · local government · OH4901112 | 4,467 served |
| CHOCTAW UTILITIES, INC. groundwater · private · OH4900212 | 2,200 served |
| MOUNT STERLING VILLAGE PWS groundwater · local government · OH4900812 | 2,059 served |
| GREEN MEADOWS MOBILE HOME PARK groundwater · private · OH4901812 | 730 served |
| SUBURBANS COMMUNITY MHP groundwater · private · OH4901612 | 655 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 43 people were held in Madison County's jail, in Vera's latest figure (2023), or 142 per 100,000 residents ages 15–64. In 2018 it was about 59.
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.
5 school districts have their office in Madison County. School taxes are usually the largest part of a property tax bill.
Spent $29.6 million — $27.2 million to run schools, about $11,999 per student, plus $1.9 million on buildings and equipment. Money in: $19.3 million local (mostly property tax), $10.1 million state, $2.7 million federal. Long-term debt: $11.8 million.
Spent $26.2 million — $24.3 million to run schools, about $11,487 per student, plus $1.3 million on buildings and equipment. Money in: $15.8 million local (mostly property tax), $10.4 million state, $3.2 million federal. Long-term debt: $6.8 million.
Spent $18.3 million — $17.3 million to run schools, about $15,871 per student, plus $796,000 on buildings and equipment. Money in: $12.6 million local (mostly property tax), $7.8 million state, $1.3 million federal.
Spent $17.9 million — $17 million to run schools, about $17,182 per student, plus $734,000 on buildings and equipment. Money in: $12.1 million local (mostly property tax), $5.7 million state, $1.4 million federal. Long-term debt: $7 million.
Spent $17.2 million — $15.6 million to run schools, about $33,753 per student, plus $1.3 million on buildings and equipment. Money in: $15.9 million local (mostly property tax), $5 million state, $889,000 federal.
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 Madison County about $11.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
200 bridges in Madison County: 132 in good condition, 51 fair, and 17 poor (8.5%). “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.
| COUNTY RD 7 over THREE MILE RUN · built 1920 | 3,334 vehicles a day |
| SR 29 over SPRING FORK CREEK · built 1955 | 2,997 vehicles a day |
| SPRING VALLEY RD. over DEER CREEK TRIBUTARY · built 1958 | 1,489 vehicles a day |
| CHESELDINE RD over DEER CREEK · built 1975 | 944 vehicles a day |
| MAPLE STREET over SWEENEY RUN · built 1928 | 740 vehicles a day |
| ROBISON RD over DEER CREEK · built 1930 | 557 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $15 million of work in Madison County in fiscal 2025, about $341 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 Ohio 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 Madison 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 Madison County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Clark County (20 mi) · Franklin County (21 mi) · Fayette County (24 mi) · Pickaway County (25 mi) · Champaign County (25 mi) · Union County (28 mi).