Lewis and Clark County's estimated 2025 population is 77,465 with a growth rate of 1.61% in the past year according to the most recent United States census data. Lewis and Clark County is the 6th largest county in Montana. The 2010 population was 63,578 and has seen a growth of 21.84% since that time.
Data after 2023 is projected based on recent change
The racial composition of Lewis and Clark County includes 91.48% White, and smaller percentages for Native American, other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Other race
Asian
Black or African American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 66,397 | 91.48% |
| Two or more races | 4,097 | 5.64% |
| Native American | 655 | 0.9% |
| Other race | 526 | 0.72% |
| Asian | 484 | 0.67% |
| Black or African American | 421 | 0.58% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Lewis and Clark County's average per capita income is $51,226. Household income levels show a median of $74,543. The poverty rate stands at 8.72%.
Name | Median | Mean |
|---|---|---|
| Married Families | $109,610 | $134,723 |
| Families | $99,043 | $123,293 |
| Households | $74,543 | $100,531 |
| Non Families | $45,120 | $63,383 |
Average Income
Median Household Income
Poverty Rate
