Lewis County Demographics

A map of Lewis County's Population by Race

Lewis County, Idaho has an estimated population of 3,682, an increase from the 3,533 recorded in the 2020 Census. The population is 81.7% White, 9.7% Multiracial, 4.3% Hispanic, 2.2% Native American/Other, 1.1% Black, and 1.0% Asian. This demographic dot map shows the population of Lewis County, with one dot drawn for each person counted by the Census, color-coded by race.

Lewis has become considerably more racially diverse since the 2020 Census. It is less diverse than Idaho overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Lewis County, that probability was 25.8% in 2020 and 32.1% in the most recent ACS estimates.

Lewis County is ranked the 41st most populous county in Idaho, out of 44 counties. Lewis County was ranked the 41st most populous county in the 2020 Census.

Lewis County's White Population

3,008 residents of Lewis County, or 81.7% of the population, identify as White. The share of White residents in Lewis County is slightly higher than in Idaho overall, where 78.6% of the population is White. Lewis County ranks 18th statewide in terms of White residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's White population has remained roughly the same. White residents' share of Lewis County's population has decreased from 85.8% to 81.7%.

Lewis County is less White than neighboring Nez Perce County (85.5% White), Latah County (84.5% White), Asotin County (87.1% White), Clearwater County (87.6% White), and Wallowa County (89.2% White).

Lewis County's Black Population

42 residents of Lewis County, or 1.1% of the population, identify as Black. The share of Black residents in Lewis County is comparable to the share in Idaho overall, where 0.7% of the population is Black. Lewis County ranks 26th statewide in terms of Black residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's Black population has grown by an estimated 600.0%. Black residents' share of Lewis County's population has increased from 0.2% to 1.1%.

Lewis County is more Black than neighboring Nez Perce County (0.2% Black), Latah County (1% Black), Asotin County (0.9% Black), and Clearwater County (0.2% Black). Lewis County is less Black than neighboring Wallowa County (1.3% Black).

Lewis County's Asian Population

37 residents of Lewis County, or 1.0% of the population, identify as Asian. The share of Asian residents in Lewis County is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Lewis County ranks 38th statewide in terms of Asian residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's Asian population has grown by an estimated 428.6%. Asian residents' share of Lewis County's population has increased from 0.2% to 1.0%.

Lewis County is more Asian than neighboring Nez Perce County (0.9% Asian), and Wallowa County (0.3% Asian). Lewis County is less Asian than neighboring Latah County (2.1% Asian), and Asotin County (1.1% Asian).

Lewis County's Hispanic Population

158 residents of Lewis County, or 4.3% of the population, identify as Hispanic. The share of Hispanic residents in Lewis County is lower than in Idaho overall, where 13.6% of the population is Hispanic. Lewis County ranks 33rd statewide in terms of Hispanic residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's Hispanic population has grown by an estimated 14.5%. Hispanic residents' share of Lewis County's population has remained roughly unchanged at 4.3%.

Lewis County is more Hispanic than neighboring Wallowa County (4.2% Hispanic). Lewis County is less Hispanic than neighboring Nez Perce County (4.4% Hispanic), Latah County (5.2% Hispanic), Asotin County (4.6% Hispanic), and Clearwater County (4.6% Hispanic).

Lewis County's Native American/Other Population

81 residents of Lewis County, or 2.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Lewis County is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Lewis County ranks 4th statewide in terms of Native American/Other residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's Native American/Other population has declined by an estimated 58.2%. Native American/Other residents' share of Lewis County's population has decreased from 5.5% to 2.2%.

Lewis County is more Native American/Other than neighboring Latah County (1.2% Native American/Other), Asotin County (1.7% Native American/Other), Clearwater County (2% Native American/Other), and Wallowa County (1% Native American/Other). Lewis County is less Native American/Other than neighboring Nez Perce County (4.9% Native American/Other).

Lewis County's Multiracial Population

356 residents of Lewis County, or 9.7% of the population, identify as Multiracial. The share of Multiracial residents in Lewis County is higher than in Idaho overall, where 4.2% of the population is Multiracial. Lewis County ranks 13th statewide in terms of Multiracial residents as a share of the population, out of 44 counties.

Since the 2020 Census, Lewis County's Multiracial population has grown by an estimated 126.8%. Multiracial residents' share of Lewis County's population has increased from 4.4% to 9.7%.

Lewis County is more Multiracial than neighboring Nez Perce County (4.2% Multiracial), Latah County (6.1% Multiracial), Asotin County (4.6% Multiracial), Clearwater County (4.6% Multiracial), and Wallowa County (4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.