Lewis County's estimated 2025 population is 3,716 with a growth rate of -0.32% 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 -2.72% since that time.
Data after 2023 is projected based on recent change
The racial composition of Lewis County includes 83.37% White, and smaller percentages for other race, Black or African American, Native American, Asian and multiracial populations.
White (83.37%)
Two or more races (10.08%)
Other race (2.3%)
Black or African American (1.7%)
Native American (1.64%)
Asian (0.9%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,042 | 83.37% |
| Two or more races | 368 | 10.08% |
| Other race | 84 | 2.3% |
| Black or African American | 62 | 1.7% |
| Native American | 60 | 1.64% |
| Asian | 33 | 0.9% |
Married
Widowed
Divorced
Separated
Never Married
Lewis County's average per capita income is $38,641. Household income levels show a median of $49,643. The poverty rate stands at 17.39%.
Name | Median | Mean |
|---|---|---|
| Married Families | $69,926 | - |
| Families | $63,450 | $83,441 |
| Households | $49,643 | $69,631 |
| Non Families | $28,309 | $43,635 |
Average Income
Median Household Income
Poverty Rate
