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
Lewis County is a county in Washington with a population of 83,925. It ranks #16 among counties in Washington by population. The median age is 42.4, older than the national median. The population is 50.4% male and 49.6% female.
The median household income in Lewis County is $69,690, below the US median of $74,580. 8.9% of residents live below the federal poverty level. Home values sit at a median of $341,500, with monthly rent averaging $1,044. The homeownership rate of 74.2% is higher than the national rate of 64.8%.
Educational attainment in Lewis County reflects 20.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 8.6% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 28.4 minutes each way.
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.