Lewis County, Washington
Located in Washington, Lewis County has a population of 85,154 residents and a median age of 42.2 years, making it the #688 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 12.2%. The median home value is $385,800, and the median household income is $74,796, which is 0% below the national median.
Demographics
Lewis County has a population of 85,154, making it the #688 most populous county in the US. The median age is 42.2 years, which is 8.5% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Lewis County is $74,796, ranking #855 out of 3,222 counties — 0.5% below the national median. The poverty rate is 12.2% and unemployment stands at 5.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Lewis County is $385,800 (+36.9% vs national). Renters pay a median of $1,097/mo and the homeownership rate is 75.8%.
Median Home Value Trend
Rankings →Household Type
Education
In Lewis County, 21.5% of adults age 25+ hold a bachelor's degree or higher, which is 36.1% below the national average, ranking #1,725 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Lewis County is 75.6 years. 18.9% of adults report poor or fair health and 9.0% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
16.2% of adults in Lewis County smoke , 40.6% are obese , and 19.9% report excessive drinking. The drug overdose death rate is 34.5 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Lewis County is 3.2 per 100,000 and the suicide rate is 19.7 per 100,000. Motor vehicle deaths occur at a rate of 12.3 per 100,000.
Homicide Rate Trend
Families & Children
16.9% of children in Lewis County live in poverty and the infant mortality rate is 7.0 per 1,000 live births. The teen birth rate is 22.0 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Lewis County is 75.5%. The mean commute time is 30.7 min, which is 11.3% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Lewis County voted Republican with a margin of 33.0%. The vote was 32% Dem / 65% Rep. Compared to 2020, the margin shifted 0.1 toward Republicans .
Vote Share Over Time
About Lewis County, Washington
Lewis County, Washington has a total population of 85,154, making it the 688th most populous county in the United States. The median age in Lewis County is 42.2 years, which is 8.5% above the national median of 38.9 years.
The median household income in Lewis County is $74,796, which ranks #855 of 3,222 counties nationwide. This is 0.5% below the national median of $75,149. The poverty rate is 12.2%, lower than the national rate of 12.6%. The unemployment rate stands at 5.3%.
The median home value in Lewis County is $385,800, 36.9% above the national median. Renters in Lewis County pay a median gross rent of $1,097 per month. The homeownership rate is 75.8%, compared to the national rate of 64.4%.
In Lewis County, 21.5% of residents aged 25 and older hold a bachelor's degree or higher, 36.1% below the national average of 33.7%. Health insurance coverage stands at 93.7% of the population. The average commute time for workers is 30.7 min.
Lewis County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 79.9% of the population, followed by Hispanic or Latino (11.5%) and Two or More Races (4.9%).
All data for Lewis County, Washington comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.