Grainger County's 2026 population is estimated at 25,825, reflecting a 1.48% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Grainger County is the 59th largest county in Tennessee. The 2010 population was 22,718 and has grown 13.68% since 2010.
Data after 2023 is projected based on recent change
Overall: 47.4 years
Female: 48 years
Male: 45.9 years
There are 19,699 adults, (5,462 of whom are seniors) in Grainger County.
Female: 12,135 (50%)
Male: 12,131 (50%)
The racial composition of Grainger County includes 95.55% White, and smaller percentages for Two or more races, Black or African American, Native American, Native Hawaiian or Pacific Islander, other race, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 23,185 | 95.55% |
| Two or more races | 346 | 1.43% |
| Black or African American | 324 | 1.34% |
| Native American | 218 | 0.9% |
| Native Hawaiian or Pacific Islander | 103 | 0.42% |
| Other race | 47 | 0.19% |
| Asian | 43 | 0.18% |
Grainger County 's average per capita income is $37,169. Household income levels show a median of $50,538. The poverty rate stands at 17.07%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $74,604 | - |
| Families | $65,237 | $86,101 |
| Households | $50,538 | $70,414 |
| Non Families | $23,975 | $34,121 |
Average Income
Median Household Income
Poverty Rate
