Johnson County's 2026 population is estimated at 21,969, reflecting a -0.37% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Johnson County is the 53rd largest county in Kentucky. The 2010 population was 23,398 and has grown -6.11% since 2010.
Overall: 42 years
Female: 43.4 years
Male: 40.4 years
There are 17,368 adults, (4,278 of whom are seniors) in Johnson County.
Female: 11,192 (50.1%)
Male: 11,142 (49.9%)
The racial composition of Johnson County includes 93.95% White, and smaller percentages for Asian, Black or African American, Native American, other race, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 20,983 | 93.95% |
| Two or more races | 862 | 3.86% |
| Asian | 312 | 1.4% |
| Black or African American | 123 | 0.55% |
| Native American | 30 | 0.13% |
| Other race | 21 | 0.09% |
| Native Hawaiian or Pacific Islander | 3 | 0.01% |
Johnson County 's average per capita income is $34,363. Household income levels show a median of $44,904. The poverty rate stands at 22.79%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $65,124 | - |
| Families | $60,751 | $75,452 |
| Households | $44,904 | $61,524 |
| Non Families | $18,440 | $25,161 |
Average Income
Median Household Income
Poverty Rate