6,307 people (2024 Census estimate, +1.1% since 2020)
306 square miles of land · 21 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.
5 active community water systems list Brown County in the area they serve, reporting 5,721 people served in all (a system that crosses county lines counts its whole population).
| MOUNT STERLING buys groundwater · local government · IL0090100 | 3,271 served |
| WESTERN IL CORRECTIONAL CENTER buys groundwater · state · IL0090010 | 1,600 served |
| VERSAILLES groundwater · local government · IL0090200 | 478 served |
| RIPLEY buys groundwater · local government · IL0090150 | 250 served |
| MOUND STATION buys groundwater · local government · IL0090050 | 122 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 1 people were held in Brown County's jail, in Vera's latest figure (1978), or 32 per 100,000 residents ages 15–64. In 1970 it was about 1.
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.
1 school district has its office in Brown County. School taxes are usually the largest part of a property tax bill.
Spent $11.8 million — $10 million to run schools, about $14,728 per student, plus $928,000 on buildings and equipment. Money in: $7.3 million local (mostly property tax), $6 million state, $994,000 federal. Long-term debt: $7.6 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Brown County about $3.2 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
71 bridges in Brown County: 34 in good condition, 27 fair, and 10 poor (14.1%). “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.
| FAS 582 over RUSSET BRANCH · built 1957 | 250 vehicles a day |
| FAS 582 over LAMOINE RIVER · built 1991 | 175 vehicles a day |
| CH-12 (FAS 582) over CAMP CREEK · built 1997 | 125 vehicles a day |
| TR 24 over MISSOURI CREEK · built 1920 | 75 vehicles a day |
| TR 84A over LITTLE MISSOURI · built 1900 | 75 vehicles a day |
| TR 84A over SO BR LT MISSOURI · built 1900 | 75 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $-102,909 of work in Brown County in fiscal 2025, about $-16 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 Brown 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 Brown County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: Schuyler County (15 mi) · Adams County (24 mi) · Pike County (24 mi) · Scott County (27 mi) · Cass County (27 mi) · Morgan County (33 mi).