27,671 people (2024 Census estimate, +0.8% since 2020)
584 square miles of land · 47 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.
6 active community water systems list Adams County in the area they serve, reporting 30,997 people served in all (a system that crosses county lines counts its whole population).
| ADAMS COUNTY REGIONAL WATER DISTRICT groundwater · local government · OH0100012 | 21,810 served |
| WEST UNION PUBLIC WATER SYSTEM buys groundwater · local government · OH0100503 | 3,170 served |
| MANCHESTER VILLAGE groundwater · local government · OH0100112 | 2,043 served |
| PEEBLES VILLAGE buys groundwater · local government · OH0100203 | 1,978 served |
| WINCHESTER PUBLIC WATER SYSTEM buys groundwater · local government · OH0100603 | 1,052 served |
| SEAMAN VILLAGE PWS buys groundwater · local government · OH0100303 | 944 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 48 people were held in Adams County's jail, in Vera's latest figure (2023), or 283 per 100,000 residents ages 15–64. In 2018 it was about 58.
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 Adams County. School taxes are usually the largest part of a property tax bill.
Spent $58.7 million — $54.4 million to run schools, about $15,329 per student, plus $2.4 million on buildings and equipment. Money in: $14.6 million local (mostly property tax), $34.8 million state, $10.9 million federal. Long-term debt: $12.1 million.
Spent $12.3 million — $11.1 million to run schools, about $15,913 per student, plus $665,000 on buildings and equipment. Money in: $2.7 million local (mostly property tax), $9 million state, $2.4 million 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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Adams County about $12.8 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
184 bridges in Adams County: 78 in good condition, 97 fair, and 9 poor (4.9%). “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.
| OLD 32 over EAST FK OHIO BRUSH CREEK · built 1968 | 571 vehicles a day |
| MARBLE FURNACE RD. over OHIO BRUSH CREEK · built 1948 | 485 vehicles a day |
| OLD CINCINNATI PK over EAST FORK EAGLE CREEK · built 1970 | 477 vehicles a day |
| BROWN HILL ROAD over STREAM · built 1930 | 398 vehicles a day |
| NEWMAN RD. over SOUTHFORKSCIOTOBRUSHCREE · built 1900 | 385 vehicles a day |
| ELMVILLE RD. over OHIO BRUSH CREEK · built 1900 | 212 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $2.4 million of work in Adams County in fiscal 2025, about $86 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 Adams 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 Adams County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Lewis County, KY (21 mi) · Brown County (22 mi) · Highland County (25 mi) · Mason County, KY (25 mi) · Scioto County (26 mi) · Pike County (28 mi).