Lewis County Demographics
A map of Lewis County's Population by Race
Lewis County, Washington has an estimated population of 85,154, an increase from the 82,149 recorded in the 2020 Census. The population is 79.9% White, 11.5% Hispanic, 4.9% Multiracial, 1.9% Native American/Other, 1.1% Asian, and 0.7% Black. 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 is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Washington 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 34.9% in 2020 and 34.5% in the most recent ACS estimates.
Lewis County is ranked the 16th most populous county in Washington, out of 39 counties. Lewis County was ranked the 16th most populous county in the 2020 Census.
Lewis County's White Population
68,038 residents of Lewis County, or 79.9% of the population, identify as White. The share of White residents in Lewis County is significantly higher than in Washington overall, where 63.1% of the population is White. Lewis County ranks 12th statewide in terms of White residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's White population has grown by an estimated 3.9%. White residents' share of Lewis County's population has remained roughly unchanged at 79.9%.
Lewis County is more White than neighboring Cowlitz County (79.6% White), Pierce County (61.4% White), Thurston County (69.5% White), and Clark County (72.5% White). Lewis County is less White than neighboring Skamania County (82.9% White).
Lewis County's Black Population
554 residents of Lewis County, or 0.7% of the population, identify as Black. The share of Black residents in Lewis County is slightly lower than in Washington overall, where 3.8% of the population is Black. Lewis County ranks 21st statewide in terms of Black residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's Black population has grown by an estimated 4.5%. Black residents' share of Lewis County's population has remained roughly unchanged at 0.7%.
Lewis County is more Black than neighboring Cowlitz County (0.6% Black). Lewis County is less Black than neighboring Pierce County (7% Black), Thurston County (3.2% Black), Skamania County (0.8% Black), and Clark County (2.1% Black).
Lewis County's Asian Population
927 residents of Lewis County, or 1.1% of the population, identify as Asian. The share of Asian residents in Lewis County is lower than in Washington overall, where 9.7% of the population is Asian. Lewis County ranks 28th statewide in terms of Asian residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's Asian population has grown by an estimated 16.5%. Asian residents' share of Lewis County's population has remained roughly unchanged at 1.1%.
Lewis County is less Asian than neighboring Cowlitz County (1.2% Asian), Pierce County (6.8% Asian), Thurston County (6% Asian), Skamania County (1.2% Asian), and Clark County (5% Asian).
Lewis County's Hispanic Population
9,810 residents of Lewis County, or 11.5% of the population, identify as Hispanic. The share of Hispanic residents in Lewis County is slightly lower than in Washington overall, where 14.4% of the population is Hispanic. Lewis County ranks 16th statewide in terms of Hispanic residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's Hispanic population has grown by an estimated 11.1%. Hispanic residents' share of Lewis County's population has increased from 10.7% to 11.5%.
Lewis County is more Hispanic than neighboring Cowlitz County (10.5% Hispanic), Thurston County (10.6% Hispanic), and Skamania County (6.7% Hispanic). Lewis County is less Hispanic than neighboring Pierce County (12.8% Hispanic), and Clark County (12.3% Hispanic).
Lewis County's Native American/Other Population
1,640 residents of Lewis County, or 1.9% 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 Washington overall, where 2.1% of the population is Native American/Other. Lewis County ranks 24th statewide in terms of Native American/Other residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's Native American/Other population has grown by an estimated 6.6%. Native American/Other residents' share of Lewis County's population has remained roughly unchanged at 1.9%.
Lewis County is more Native American/Other than neighboring Cowlitz County (1.8% Native American/Other), and Clark County (1.7% Native American/Other). Lewis County is less Native American/Other than neighboring Pierce County (2.8% Native American/Other), Thurston County (2.8% Native American/Other), and Skamania County (2.2% Native American/Other).
Lewis County's Multiracial Population
4,185 residents of Lewis County, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in Lewis County is comparable to the share in Washington overall, where 6.8% of the population is Multiracial. Lewis County ranks 18th statewide in terms of Multiracial residents as a share of the population, out of 39 counties.
Since the 2020 Census, Lewis County's Multiracial population has declined by an estimated 15.6%. Multiracial residents' share of Lewis County's population has decreased from 6.0% to 4.9%.
Lewis County is less Multiracial than neighboring Cowlitz County (6.3% Multiracial), Pierce County (9.2% Multiracial), Thurston County (7.9% Multiracial), Skamania County (6.2% Multiracial), and Clark County (6.4% 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.