Lewis County's estimated 2026 population is 3,695 with a growth rate of -0.24% in the past year according to the most recent United States census data. Lewis County is the 41st largest county in Idaho. The 2010 population was 3,820 and has seen a growth of -3.27% since that time.
Data after 2023 is projected based on recent change
Overall: 49 years
Female: 48.7 years
Male: 50 years
There are 2,874 adults, (1,043 of whom are seniors) in Lewis County.
Female: 1,832 (49.8%)
Male: 1,850 (50.2%)
The racial composition of Lewis County includes 82.81% White, and smaller percentages for other race, Native American, Black or African American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,049 | 82.81% |
| Two or more races | 419 | 11.38% |
| Other race | 87 | 2.36% |
| Native American | 48 | 1.3% |
| Black or African American | 42 | 1.14% |
| Asian | 37 | 1% |
Lewis County's average per capita income is $41,528. Household income levels show a median of $51,615. The poverty rate stands at 15.31%.
Name | Median | Mean |
|---|---|---|
| Married Families | $72,266 | - |
| Families | $65,417 | $85,324 |
| Households | $51,615 | $73,126 |
| Non Families | $27,900 | $47,612 |
Average Income
Median Household Income
Poverty Rate
