Putnam County's 2026 population is estimated at 34,110, reflecting a -0.14% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Putnam County is the 70th largest county in Ohio. The 2010 population was 34,476 and has grown -1.06% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.6 years
Female: 41.4 years
Male: 40.1 years
There are 25,561 adults, (6,492 of whom are seniors) in Putnam County.
Female: 17,119 (49.9%)
Male: 17,195 (50.1%)
The racial composition of Putnam County includes 92.09% White, 3.23% other race, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 31,599 | 92.09% |
| Two or more races | 1,112 | 3.24% |
| Other race | 1,107 | 3.23% |
| Black or African American | 278 | 0.81% |
| Native American | 133 | 0.39% |
| Asian | 64 | 0.19% |
| Native Hawaiian or Pacific Islander | 21 | 0.06% |
Putnam County 's average per capita income is $53,293. Household income levels show a median of $84,928. The poverty rate stands at 5.49%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $108,343 | - |
| Families | $103,144 | $121,757 |
| Households | $84,928 | $102,439 |
| Non Families | $41,144 | $50,860 |
Average Income
Median Household Income
Poverty Rate
