Total Population in Lewis and Clark County, MT
ACS 2024 5-Year Estimates
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Lewis and Clark County's total population of 73,464 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Lewis and Clark County for total population.
Nearby Rankings
Full ranking →| #760 | Wood County, WI | 74,004 |
| #761 | Lea County, NM | 73,733 |
| #762 | Kauai County, HI | 73,731 |
| #763 | Lewis and Clark County, MT | 73,464 |
| #764 | Pottawatomie County, OK | 73,463 |
| #765 | Raleigh County, WV | 73,195 |
| #766 | Toa Baja Municipio, PR | 73,039 |
About Total Population
Lewis and Clark County, Montana has a total population of 73,464, ranking #763 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Montana, it ranks #6 of 56. This places it in the 76th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.