Lewis County's 2026 population is estimated at 13,962, reflecting a 1.99% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lewis County is the 83rd largest county in Tennessee. The 2010 population was 12,175 and has grown 14.68% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.9 years
Female: 46.5 years
Male: 39.1 years
There are 10,246 adults, (2,671 of whom are seniors) in Lewis County.
Female: 6,396 (49.2%)
Male: 6,596 (50.8%)
The racial composition of Lewis County includes 92.88% White, and smaller percentages for Black or African American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 12,067 | 92.88% |
| Two or more races | 747 | 5.75% |
| Black or African American | 73 | 0.56% |
| Asian | 47 | 0.36% |
| Other race | 37 | 0.28% |
| Native Hawaiian or Pacific Islander | 21 | 0.16% |
Lewis County 's average per capita income is $42,348. Household income levels show a median of $56,285. The poverty rate stands at 16.75%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,810 | - |
| Families | $82,750 | $104,014 |
| Households | $56,285 | $81,653 |
| Non Families | $25,240 | $38,662 |
Average Income
Median Household Income
Poverty Rate
