Lewis County's 2026 population is estimated at 26,542, reflecting a -0.05% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lewis County is the 59th largest county in New York. The 2010 population was 27,072 and has grown -1.96% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.9 years
Female: 41.8 years
Male: 42 years
There are 20,588 adults, (5,466 of whom are seniors) in Lewis County.
Female: 13,113 (49.3%)
Male: 13,494 (50.7%)
The racial composition of Lewis County includes 93.9% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 24,983 | 93.9% |
| Two or more races | 981 | 3.69% |
| Black or African American | 282 | 1.06% |
| Other race | 264 | 0.99% |
| Asian | 89 | 0.33% |
| Native American | 8 | 0.03% |
Lewis County 's average per capita income is $47,396. Household income levels show a median of $68,182. The poverty rate stands at 12.34%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $93,079 | $104,079 |
| Families | $79,375 | $93,821 |
| Households | $68,182 | $80,901 |
| Non Families | $39,205 | $50,042 |
Average Income
Median Household Income
Poverty Rate
