Lewis County, Washington Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Lewis County, WA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
B
Health Around average
-
D
Income Well below averageLess wealthy than 79% of counties in Washington
-
D
Education Well below averageLess educated than 74% of counties in Washington
Source: Map AI Methodology
Population: density and quick facts
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| Population | 85,146 | 7,801,159 | 337,468,954 |
| Population density (per sq mi) | 35.0 | 109.3 | 86.4 |
| Population growth (%/yr) | 1.47% | 1.21% | 0.59% |
| Median age | 43.8 | 36.2 | 37.3 |
| Households | 32,913 | 3,058,619 | 130,235,071 |
Population in Lewis County grew by 15.9% from 2009 to 2024, reaching 85,146 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Lewis County is Boomers, aged 61–79, at 21.0% of residents. That is 4.8 points above Washington as a whole.
- Gen Z 13–28 16,061 18.9% -2.6 pts
- Millennials 29–44 16,249 19.1% -4.2 pts
- Gen X 45–60 17,212 20.2% +0.7 pts
- Boomers 61–79 17,901 21.0% +4.8 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Washington, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.6% of the people living in Lewis County and men 50.4%.
- Women 49.6% Washington 49.7%
- Men 50.4% Washington 50.3%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Lewis County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Lewis County has a the economy index of D, which means it is barely prosperous.
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median household income | $74,810 | $98,224 | $80,455 |
| Income growth (%/yr) | 6.72% | 5.64% | 4.80% |
| Unemployment rate | 5.3% | 5.0% | 5.2% |
The median household income in Lewis County is about 24% lower than in Washington.
Housing
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| Median home price | $399,467 | $485,016 | $248,835 |
| Median rent | $1,097 | $1,759 | $1,407 |
| Homeownership rate | 75.8% | 63.8% | 65.2% |
The median home price in Lewis County is about 30.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,097 per month for that long.
Commute Time & Mobility
Commuters in Lewis County spend about 43 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 181 hours, about 7.5 full days, spent commuting.
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 21.7 | 22.4 | 22.4 |
| Round-trip commute (min) | 43.3 | 44.8 | 44.8 |
| Yearly time spent (hours) | 181 | 187 | 187 |
| Estimated yearly cost | $5,597 | $5,785 | $5,790 |
| Work from home | 9.7% | 19.8% | 15.0% |
| Highway traffic (vehicles/day) | 10,943 | 10,119 | 8,813 |
| Local road traffic (vehicles/day) | 834 | 1,525 | 1,355 |
Fastest commutes among counties in
Washington:
Walla Walla County (12.2 min), San Juan County (12.3 min), Asotin County (13.2 min).
Slowest:
Mason County (32.0 min), Garfield County (28.4 min), Snohomish County (28.3 min).
The average commute time in Lewis County is about the same as in Washington.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Lewis County has a education index of D, which means it is barely educated.
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 18.2% | 35.1% | 31.6% |
| Average household size | 2.56 | 2.50 | 2.53 |
Highest education index among counties in
Washington:
King County (0.4), San Juan County (0.4), Jefferson County (0.4).
Lowest:
Adams County (0.2), Yakima County (0.2), Grant County (0.2).
Health
Lewis County has a health index of B, which means it is quite healthy.
| Metric | Lewis County | Washington Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 78.3 | 79.6 | 78.3 |
| Self-rated poor health | 16.2% | 15.4% | 16.3% |
| Smokers | 17.8% | 16.4% | 19.0% |
Highest health index among counties in
Washington:
King County (0.8), Whitman County (0.8), San Juan County (0.8).
Lowest:
Adams County (0.8), Okanogan County (0.8), Pacific County (0.8).
Lewis County, WA Compared With Nearby Counties
Lewis County, WA is the smallest of the 5 counties compared here, 85,146 residents against a local median of 407,878. Where Lewis County, WA breaks from the counties next to it is median household income, sitting 23% below the local median of $97,196 at $74,810. That is the weaker end of the local range on this measure.
The counties themselves spread $22,984 on median household income, so Lewis County, WA sits at one end of an already wide local range rather than apart from it. Lewis County, WA has the 5th highest median household income of the 5 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Lewis County, WA | 85,146 | $74,810 #5/5 | $399,467 #4/5 | 21.7 min #2/5 |
| Cowlitz County, WA | 112,357 | $76,590 | $394,545 | 18.9 min |
| Pierce County, WA | 929,755 | $99,574 | $446,511 | 26.9 min |
| Thurston County, WA | 299,046 | $96,312 | $427,911 | 22.1 min |
| Clark County, WA | 516,710 | $98,079 | $477,323 | 21.7 min |
Frequently Asked Questions
Common questions about Lewis County, Washington.
What is the population of Lewis County, Washington?
About 85,146 people live in Lewis County, Washington, in 32,913 households of 2.6 people on average. The median age is 43.8, so residents are older than the U.S. median of 37.3 by about 6 years.
Is Lewis County, Washington urban or rural?
Averaged over its land area, Lewis County, Washington has 35 people per square mile, a density typical of rural areas. That is about 40% of the U.S. average of 86.
Can a typical household afford a home in Lewis County, Washington?
The median home costs 5.3 times the median household income ($399,467 against $74,810), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,097 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
What share of adults in Lewis County, Washington have a college degree?
18.2% of adults in Lewis County, Washington hold a bachelor's degree or higher (about 1 in 5), well below the U.S. share of 31.6%.
Analyze any area in the US
Get local demographics for any address, aggregated by drive time or radius, on the interactive map.
Explore the map →