Lewis County Demographics
A map of Lewis County's Population by Race
Lewis County, Missouri has an estimated population of 9,924, a slight decrease from the 10,032 recorded in the 2020 Census. The population is 91.5% White, 3.9% Black, 2.9% Multiracial, 1.1% Hispanic, 0.5% Asian, and 0.1% Native American/Other. 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 more racially diverse since the 2020 Census. It is considerably less diverse than Missouri 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 13.6% in 2020 and 16.0% in the most recent ACS estimates.
Lewis County is ranked the 86th most populous county in Missouri, out of 115 counties. Lewis County was ranked the 86th most populous county in the 2020 Census.
Lewis County's White Population
9,084 residents of Lewis County, or 91.5% of the population, identify as White. The share of White residents in Lewis County is significantly higher than in Missouri overall, where 76.3% of the population is White. Lewis County ranks 24th statewide in terms of White residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's White population has declined by an estimated 2.5%. White residents' share of Lewis County's population has decreased from 92.9% to 91.5%.
Lewis County is more White than neighboring Marion County (89% White), and Adams County (90% White). Lewis County is less White than neighboring Clark County (94.9% White), Knox County (94.8% White), and Shelby County (93.6% White).
Lewis County's Black Population
383 residents of Lewis County, or 3.9% of the population, identify as Black. The share of Black residents in Lewis County is lower than in Missouri overall, where 10.9% of the population is Black. Lewis County ranks 43rd statewide in terms of Black residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's Black population has grown by an estimated 107.0%. Black residents' share of Lewis County's population has increased from 1.8% to 3.9%.
Lewis County is more Black than neighboring Clark County (1.9% Black), Knox County (0.6% Black), Shelby County (1.1% Black), and Adams County (2.8% Black). Lewis County is less Black than neighboring Marion County (4.2% Black).
Lewis County's Asian Population
50 residents of Lewis County, or 0.5% of the population, identify as Asian. The share of Asian residents in Lewis County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Lewis County ranks 86th statewide in terms of Asian residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's Asian population has grown by an estimated 127.3%. Asian residents' share of Lewis County's population has remained roughly unchanged at 0.5%.
Lewis County is more Asian than neighboring Clark County (0.1% Asian), Knox County (0.2% Asian), and Shelby County (0.4% Asian). Lewis County is less Asian than neighboring Marion County (0.8% Asian), and Adams County (0.7% Asian).
Lewis County's Hispanic Population
111 residents of Lewis County, or 1.1% of the population, identify as Hispanic. The share of Hispanic residents in Lewis County is slightly lower than in Missouri overall, where 5.2% of the population is Hispanic. Lewis County ranks 87th statewide in terms of Hispanic residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's Hispanic population has declined by an estimated 32.7%. Hispanic residents' share of Lewis County's population has decreased from 1.6% to 1.1%.
Lewis County is more Hispanic than neighboring Clark County (1% Hispanic), and Knox County (0.3% Hispanic). Lewis County is less Hispanic than neighboring Marion County (2% Hispanic), Shelby County (2.3% Hispanic), and Adams County (2.1% Hispanic).
Lewis County's Native American/Other Population
6 residents of Lewis County, or 0.1% 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 Missouri overall, where 0.7% of the population is Native American/Other. Lewis County ranks 101st statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's Native American/Other population has declined by an estimated 85.0%. Native American/Other residents' share of Lewis County's population has remained roughly unchanged at 0.1%.
Lewis County is more Native American/Other than neighboring Clark County (0% Native American/Other). Lewis County is less Native American/Other than neighboring Marion County (0.5% Native American/Other), Knox County (2.3% Native American/Other), and Adams County (0.3% Native American/Other).
Lewis County's Multiracial Population
290 residents of Lewis County, or 2.9% of the population, identify as Multiracial. The share of Multiracial residents in Lewis County is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. Lewis County ranks 101st statewide in terms of Multiracial residents as a share of the population, out of 115 counties.
Since the 2020 Census, Lewis County's Multiracial population has declined by an estimated 4.9%. Multiracial residents' share of Lewis County's population has remained roughly unchanged at 2.9%.
Lewis County is more Multiracial than neighboring Clark County (2.1% Multiracial), Knox County (1.8% Multiracial), and Shelby County (2.5% Multiracial). Lewis County is less Multiracial than neighboring Marion County (3.5% Multiracial), and Adams County (4.1% 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.