134,985 people (2024 Census estimate, −0.7% since 2020)
396 square miles of land · 341 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.
27 active community water systems list Clark County in the area they serve, reporting 92,484 people served in all (a system that crosses county lines counts its whole population).
| SPRINGFIELD CITY PWS groundwater · local government · OH1204412 | 60,680 served |
| CLARK COUNTY NORTHRIDGE PWS buys groundwater · private · OH1201003 | 8,874 served |
| NEW CARLISLE CITY PWS groundwater · local government · OH1203312 | 5,800 served |
| CLARK COUNTY PARK LAYNE PWS groundwater · local government · OH1201112 | 4,221 served |
| CLARK COUNTY GREEN MEADOWS 2 PWS buys groundwater · private · OH1200703 | 3,008 served |
| ENON VILLAGE PWS groundwater · local government · OH1201812 | 2,415 served |
| SOUTH CHARLESTON VILLAGE PWS groundwater · local government · OH1204212 | 1,660 served |
| FAIRWAY TERRACE MHP PWS groundwater · private · OH1202312 | 800 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 218 people were held in Clark County's jail, in Vera's latest figure (2023), or 265 per 100,000 residents ages 15–64. In 2018 it was about 228.
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.
8 school districts have their office in Clark County. School taxes are usually the largest part of a property tax bill.
Spent $128.1 million — $113.7 million to run schools, about $16,018 per student, plus $7.5 million on buildings and equipment. Money in: $36.4 million local (mostly property tax), $76.1 million state, $26.7 million federal. Long-term debt: $178.1 million.
Spent $68.8 million — $37.4 million to run schools, about $12,566 per student, plus $27.7 million on buildings and equipment. Money in: $27.5 million local (mostly property tax), $24.3 million state, $2.9 million federal. Long-term debt: $77.1 million.
Spent $41.7 million — $37.5 million to run schools, about $13,900 per student, plus $2.1 million on buildings and equipment. Money in: $12.8 million local (mostly property tax), $23.2 million state, $7.4 million federal. Long-term debt: $13.1 million.
Spent $25.1 million — $23.8 million to run schools, about $13,997 per student, plus $885,000 on buildings and equipment. Money in: $16.8 million local (mostly property tax), $7.3 million state, $3 million federal. Long-term debt: $2 million.
Spent $22.6 million — $20.9 million to run schools, about $12,522 per student, plus $1.3 million on buildings and equipment. Money in: $13.3 million local (mostly property tax), $8.4 million state, $3.4 million federal. Long-term debt: $24.5 million.
Spent $23.6 million — $20 million to run schools, about $12,593 per student, plus $2 million on buildings and equipment. Money in: $13.2 million local (mostly property tax), $7.3 million state, $2.1 million federal. Long-term debt: $34.1 million.
Spent $11.5 million — $11.2 million to run schools, about $16,123 per student, plus $205,000 on buildings and equipment. Money in: $5.8 million local (mostly property tax), $5.1 million state, $1.2 million federal. Long-term debt: $189,000.
Spent $14.6 million — $13.7 million to run schools, about $23,025 per student, plus $852,000 on buildings and equipment. Money in: $6.6 million local (mostly property tax), $7.5 million state, $1.3 million federal. Long-term debt: $300,000.
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 Clark County about $32.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
340 bridges in Clark County: 254 in good condition, 85 fair, and 1 poor (0.3%). “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.
| OAKDALE ROAD over BELMONT CREEK · built 1970 | 8,355 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $27.5 million of work in Clark County in fiscal 2025, about $202 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 Clark 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 Clark County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Champaign County (15 mi) · Greene County (17 mi) · Madison County (20 mi) · Miami County (25 mi) · Montgomery County (29 mi) · Fayette County (30 mi).