Lewis County, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 16th-largest in Washington
The population of Lewis County, Washington is 83,925 as of the 2023 American Community Survey, making it the 16th-largest county in Washington. The median household income is $69,690, the median home value is $341,500, and the median age is 42.4.
The population of Lewis County has grown 15.3% since 2010 (75,503 → 87,049), a +1.02% annualized rate.
83,925
Population
+1.02%
Annual growth
35
People / sq mi
$69,690
Median Income
$341,500
Median Home Value
Lewis County covers 2,403 sq mi of land at 34.9 people per square mile.
About Lewis County, WA
Housing cost is the defining feature of Lewis County: the median home is valued at $341,500. With 83,925 residents, Lewis County is a county in Washington. It ranks #16 among counties in Washington by population.
Household earnings are middling, with a median of $69,690 — below the US median of $78,538. Poverty runs at 8.9%, below the national 12.4%. Home values run above average at $341,500, with typical rent around $1,044.
20.2% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Remote work is below the national 14.0% at 8.6%, and the average commute runs about 28 minutes each way.
High housing values reframe the income picture in Lewis County — even solid earnings stretch less against home prices and rents at this level.
Lewis County Population History (2010-2024)
The county of Lewis County had a population of 75,503 in 2010 and 87,049 in 2024, a 15.3% growth over 14 years. The peak was 87,049 in 2024. Average annual growth rate: 1.03%.
87,049
Population (2024)
75,503
Population (2010)
87,049
Peak (2024)
1.03%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 75,503 |
| 2011 | 75,674 |
| 2012 | 75,452 |
| 2013 | 74,994 |
| 2014 | 74,877 |
| 2015 | 75,474 |
| 2016 | 76,709 |
| 2017 | 78,269 |
| 2018 | 79,466 |
| 2019 | 80,599 |
| 2020 | 82,562 |
| 2021 | 84,590 |
| 2022 | 85,307 |
| 2023 | 86,264 |
| 2024 | 87,049 |
Race & Ethnicity
| White | 83.6% |
| Black or African American | 0.8% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 3.6% |
| Two or More Races | 0.1% |
Age & Sex
42.4
Median Age
49.6%
Female
50.4%
Male
21.3%
Age 65+
Age Distribution
Children (under 15): 17.8% · Seniors (65+): 21.3%
Income & Poverty
| Median household income | $69,690$-25,262 vs state |
| Mean household income | $86,552 |
| Per-capita income | $33,972 |
| Poverty rate | 8.9%+2.5% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 51.9% |
Top Industries by Employment
The largest employment sector in Lewis County is professional & business services, accounting for 20.4% of workers.
How residents commute
0.5%
Drive alone
3.8%
Carpool
73.6%
Public transit
8.6%
Work from home
28.4 min
Avg commute
Housing
$341,500$-178,300 vs state
Median home value
$1,044
Median rent
74.2%
Homeownership rate
36,037
Total housing units
89.7%
Occupied
10.3%
Vacant
25.8%
Renter-occupied
Social & access
92.9%
With health insurance
93.4%
With broadband internet
33.9%
Foreign-born
9.5%
Veterans (18+)
19.8%
With a disability
91.2%
Speak language other than English at home
Education
90.4%
High School+
20.2%
Bachelor's+
Largest cities in Washington
Other counties in Washington
Part of Washington
Metro areas in Washington
County rankings
Frequently Asked Questions
Lewis County, Washington has a population of 83,925 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 16th-largest county in Washington. Population density is 35 people per square mile.
The population of Lewis County has grown 15.3% since 2010 (75,503 → 87,049), a +1.02% annualized rate.
The median household income in Lewis County, Washington is $69,690, with mean (average) household income of $86,552 and per-capita income of $33,972. 8.9% of residents live below the federal poverty level.
In Lewis County, the largest racial and ethnic groups are White (83.6%), Hispanic or Latino (3.6%), Black or African American (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Lewis County, Washington is 42.4 years. Residents are 49.6% female and 50.4% male.
The median home value in Lewis County is $341,500 and median monthly rent is $1,044. 74.2% of occupied housing units are owner-occupied. The county has 36,037 total housing units, 10.3% of which are vacant.
The largest employment sector in Lewis County, Washington is professional, scientific, and management services, employing 20.4% of workers. The unemployment rate is 3.3%.
Seattle is among the largest cities associated with Lewis County, Washington, with a population of 741,440.
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Statewide data for Washington
Population, race, income, age, and trends across Washington
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.