12,852 people (2024 Census estimate, +1.8% since 2020)
494 square miles of land · 26 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.
3 active community water systems list Madison County in the area they serve, reporting 6,387 people served in all (a system that crosses county lines counts its whole population).
| FREDERICKTOWN PWS surface water · local government · MO4010290 | 4,429 served |
| MADISON COUNTY PWSD 1 NORTH AND SOUTH groundwater · local government · MO4024368 | 1,705 served |
| MARQUAND PWS groundwater · local government · MO4010501 | 253 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 19 people were held in Madison County's jail, in Vera's latest figure (2019), or 243 per 100,000 residents ages 15–64. In 2014 it was about 27.
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 Madison County. School taxes are usually the largest part of a property tax bill.
Spent $23 million — $21.5 million to run schools, about $11,314 per student, plus $866,000 on buildings and equipment. Money in: $6.3 million local (mostly property tax), $12.7 million state, $5 million federal.
Spent $3.1 million — $2.6 million to run schools, about $21,136 per student, plus $386,000 on buildings and equipment. Money in: $826,000 local (mostly property tax), $1.1 million state, $1.5 million federal. Long-term debt: $315,000.
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 Madison County about $15 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
117 bridges in Madison County: 39 in good condition, 56 fair, and 22 poor (18.8%). “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.
| MINE LA MOTTE AVE over SALINE CR · built 1931 | 7,222 vehicles a day |
| MO 72 E over TURKEY CR · built 1925 | 1,238 vehicles a day |
| RT E E over MARBLE CR · built 1953 | 812 vehicles a day |
| CO. RD.275 over LIT ST FRANCOIS RVR · built 1962 | 500 vehicles a day |
| RT M S over SHELTERS CR · built 1934 | 390 vehicles a day |
| RT M S over E FK BIG CR · built 1934 | 390 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $3.6 million of work in Madison County in fiscal 2025, about $286 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 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 Missouri: the state government and every county in Missouri.
Nearby counties: Bollinger County (21 mi) · Iron County (22 mi) · St. Francois County (24 mi) · Wayne County (26 mi) · Ste. Genevieve County (30 mi) · Perry County (34 mi).