38,219 people (2024 Census estimate, −0.5% since 2020)
522 square miles of land · 73 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 Guernsey County in the area they serve, reporting 28,937 people served in all (a system that crosses county lines counts its whole population).
| CAMBRIDGE, CITY OF surface water · local government · OH3000111 | 10,520 served |
| GUERNSEY CO. WATER DEPT. buys surface water · local government · OH3000603 | 8,891 served |
| BYESVILLE groundwater (surface-influenced) · local government · OH3001212 | 5,104 served |
| WESTERN GUERNSEY REGIONAL WATER DISTRICT buys surface water · local government · OH3001103 | 3,225 served |
| QUAKER CITY buys surface water · local government · OH3001011 | 750 served |
| PLEASANT CITY, VILLAGE OF groundwater · local government · OH3000912 | 447 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 99 people were held in Guernsey County's jail, in Vera's latest figure (2023), or 424 per 100,000 residents ages 15–64. In 2018 it was about 101.
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 Guernsey County. School taxes are usually the largest part of a property tax bill.
Spent $33.6 million — $25.9 million to run schools, about $13,766 per student, plus $6.6 million on buildings and equipment. Money in: $10.7 million local (mostly property tax), $14.6 million state, $9.7 million federal. Long-term debt: $1.2 million.
Spent $25 million — $21.4 million to run schools, about $14,393 per student, plus $2.7 million on buildings and equipment. Money in: $10.9 million local (mostly property tax), $11.3 million state, $3.4 million federal. Long-term debt: $28.3 million.
Spent $22.2 million — $18.1 million to run schools, about $16,854 per student, plus $3.7 million on buildings and equipment. Money in: $9.2 million local (mostly property tax), $8.2 million state, $2.9 million federal. Long-term debt: $707,000.
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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Guernsey County about $9.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
353 bridges in Guernsey County: 149 in good condition, 170 fair, and 34 poor (9.6%). “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.
| COUNTY RD 35 over LEATHERWOOD CREEK · built 1965 | 6,684 vehicles a day |
| SR 313 over OVER WILLS CREEK · built 1958 | 3,143 vehicles a day |
| COUNTY RD 33 over CROSSES OVER WILLS CREEK · built 1992 | 1,112 vehicles a day |
| COUNTY ROAD 44 over CROOKED CREEK · built 2003 | 477 vehicles a day |
| COUNTY RD 49 over SALT FORK · built 1965 | 367 vehicles a day |
| TOWNSHIP RD TO587 over CROSSES OVER BRUSHY FORK · built 1992 | 351 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $14.2 million of work in Guernsey County in fiscal 2025, about $368 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 Guernsey 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 Guernsey County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Noble County (20 mi) · Muskingum County (24 mi) · Harrison County (27 mi) · Tuscarawas County (27 mi) · Belmont County (28 mi) · Coshocton County (28 mi).