Guernsey County's 2026 population is estimated at 38,405, reflecting a 0.24% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Guernsey County is the 65th largest county in Ohio. The 2010 population was 40,152 and has grown -4.35% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.9 years
Female: 43.7 years
Male: 41.5 years
There are 29,768 adults, (7,664 of whom are seniors) in Guernsey County.
Female: 19,206 (50.2%)
Male: 19,017 (49.8%)
The racial composition of Guernsey County includes 93.82% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 35,860 | 93.82% |
| Two or more races | 1,297 | 3.39% |
| Black or African American | 754 | 1.97% |
| Other race | 171 | 0.45% |
| Asian | 132 | 0.35% |
| Native American | 9 | 0.02% |
Guernsey County 's average per capita income is $43,498. Household income levels show a median of $58,478. The poverty rate stands at 15.31%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $81,536 | $103,332 |
| Families | $73,104 | $89,061 |
| Households | $58,478 | $75,252 |
| Non Families | $33,785 | $47,797 |
Average Income
Median Household Income
Poverty Rate
