Lewis and Clark County Demographics

A map of Lewis and Clark County's Population by Race

Lewis and Clark County, Montana had a population of 70,973 in 2020. It was 87.4% White, 0.4% Black, 0.8% Asian, 3.7% Hispanic, 2.2% Native American/Other, and 5.5% Multiracial. This map presents the population of Lewis and Clark County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Lewis and Clark County is the 6th most populous county of the 56 counties in Montana.

Lewis and Clark County's White Population

62,063 residents of Lewis and Clark County identify as White, or 87.4%. This makes the White share of the population of Lewis and Clark County roughly similar to the White share of the population of Montana (83.1% White). Of the 56 counties in Montana, Lewis and Clark County is ranked #37 in terms of White residents as a share of the population.

Lewis and Clark County is more White than neighboring Powell County (86.6% White), Cascade County (81.5% White), and Pondera County (78.7% White). Lewis and Clark County is less White than neighboring Teton County (90.8% White), and Jefferson County (90.4% White).

Lewis and Clark County's Black Population

266 residents of Lewis and Clark County identify as Black, or 0.4%. This makes the Black share of the population of Lewis and Clark County roughly similar to the Black share of the population of Montana (0.5% Black). Of the 56 counties in Montana, Lewis and Clark County is ranked #14 in terms of Black residents as a share of the population.

Lewis and Clark County is more Black than neighboring Teton County (0.3% Black), Jefferson County (0.1% Black), and Pondera County (0.1% Black). Lewis and Clark County is less Black than neighboring Powell County (0.9% Black), and Cascade County (1.3% Black).

Lewis and Clark County's Asian Population

551 residents of Lewis and Clark County identify as Asian, or 0.8%. This makes the Asian share of the population of Lewis and Clark County roughly similar to the Asian share of the population of Montana (0.7% Asian). Of the 56 counties in Montana, Lewis and Clark County is ranked #7 in terms of Asian residents as a share of the population.

Lewis and Clark County is more Asian than neighboring Powell County (0.3% Asian), Teton County (0.2% Asian), Jefferson County (0.4% Asian), and Pondera County (0.4% Asian). Lewis and Clark County is less Asian than neighboring Cascade County (1.1% Asian).

Lewis and Clark County's Hispanic Population

2,599 residents of Lewis and Clark County identify as Hispanic, or 3.7%. This makes the Hispanic share of the population of Lewis and Clark County roughly similar to the Hispanic share of the population of Montana (4.2% Hispanic). Of the 56 counties in Montana, Lewis and Clark County is ranked #12 in terms of Hispanic residents as a share of the population.

Lewis and Clark County is more Hispanic than neighboring Powell County (2.3% Hispanic), Teton County (1.4% Hispanic), Jefferson County (2.4% Hispanic), and Pondera County (1.6% Hispanic). Lewis and Clark County is less Hispanic than neighboring Cascade County (4.8% Hispanic).

Lewis and Clark County's Native American/Other Population

1,564 residents of Lewis and Clark County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 2.2%. This makes the Native American/Other share of the population of Lewis and Clark County roughly similar to the Native American/Other share of the population of Montana (6.4% Native American/Other). Of the 56 counties in Montana, Lewis and Clark County is ranked #21 in terms of Native American/Other residents as a share of the population.

Lewis and Clark County is more Native American/Other than neighboring Jefferson County (1.7% Native American/Other). Lewis and Clark County is less Native American/Other than neighboring Powell County (6.1% Native American/Other), Teton County (2.3% Native American/Other), Cascade County (5.1% Native American/Other), and Pondera County (15.5% Native American/Other).

Lewis and Clark County's Multiracial Population

3,930 residents of Lewis and Clark County identify as Multiracial, or 5.5%. This makes the Multiracial share of the population of Lewis and Clark County roughly similar to the Multiracial share of the population of Montana (5% Multiracial). Of the 56 counties in Montana, Lewis and Clark County is ranked #10 in terms of Multiracial residents as a share of the population.

Lewis and Clark County is more Multiracial than neighboring Powell County (3.7% Multiracial), Teton County (4.9% Multiracial), Jefferson County (5% Multiracial), and Pondera County (3.7% Multiracial). Lewis and Clark County is less Multiracial than neighboring Cascade County (6.3% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.