28,886 people (2024 Census estimate, −1.2% since 2020)
467 square miles of land · 62 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 Gallia County in the area they serve, reporting 28,959 people served in all (a system that crosses county lines counts its whole population).
| GALLIA CO RURAL WATER ASSOCIATION groundwater · private · OH2700012 | 20,995 served |
| GALLIPOLIS PWS groundwater · private · OH2700112 | 7,134 served |
| RIO GRANDE buys groundwater · private · OH2700316 | 830 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 70 people were held in Gallia County's jail, in Vera's latest figure (2023), or 400 per 100,000 residents ages 15–64. In 2018 it was about 30.
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.
3 school districts have their office in Gallia County. School taxes are usually the largest part of a property tax bill.
Spent $36.7 million — $32.9 million to run schools, about $15,027 per student, plus $2.4 million on buildings and equipment. Money in: $17.8 million local (mostly property tax), $14.6 million state, $9.2 million federal. Long-term debt: $24.7 million.
Spent $28 million — $22.6 million to run schools, about $11,548 per student, plus $4.1 million on buildings and equipment. Money in: $9.7 million local (mostly property tax), $13.6 million state, $7 million federal. Long-term debt: $13.3 million.
Spent $18.2 million — $14.3 million to run schools, about $28,378 per student, plus $1 million on buildings and equipment. Money in: $7 million local (mostly property tax), $9.4 million state, $2.6 million federal. Long-term debt: $204,000.
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 Gallia County about $11.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
237 bridges in Gallia County: 88 in good condition, 137 fair, and 12 poor (5.1%). “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.
| CENTENARY SCHOOL over CLEAR FORK · built 1965 | 869 vehicles a day |
| BLADEN RD over SWANCREEK · built 1950 | 577 vehicles a day |
| BLADEN RD over STREAM · built 1983 | 577 vehicles a day |
| WHITE RD over BLOSSER CREEK · built 1965 | 522 vehicles a day |
| SR 233 over DIRTYFACE CREEK · built 1933 | 491 vehicles a day |
| TEENS RUN RD over STREAM · built 1965 | 391 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $15.4 million of work in Gallia County in fiscal 2025, about $528 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 Gallia 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 Gallia County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Mason County, WV (15 mi) · Lawrence County (19 mi) · Jackson County (22 mi) · Meigs County (24 mi) · Cabell County, WV (28 mi) · Putnam County, WV (30 mi).