Demographics of Lewis County, Washington

Lewis County, Washington had 88,062 people on July 1, 2025, by the Census Bureau’s estimate: +5,511 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Lewis County, in four figures

88,062
Population: July 1, 2025, Vintage 2025 estimate.; +6.7%
Change since July 2020: +5,511 people.; 42.2 ±0.4
Median age: ACS 2020–⁠2024.; $74,796 ±$3,695
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Lewis County, Washington's population grew 6.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Lewis County, Washington's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Lewis County, Washington's population grew 6.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Lewis County, Washington's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	82,551	100.0	100.0
2021	84,576	102.5	100.2
2022	85,293	103.3	100.7
2023	86,277	104.5	101.6
2024	87,131	105.5	102.5
2025	88,062	106.7	103.1

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Population of Lewis County, Washington on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	82,551	+407	−8	+1	+442
2021	84,576	+2,025	−168	+32	+2,249
2022	85,293	+717	−284	+62	+920
2023	86,277	+984	−122	+140	+963
2024	87,131	+854	−143	+255	+749
2025	88,062	+931	−124	+122	+941

Age, 2020–2024

The median age is 42.2 ±0.4: for men 40.9 ±0.5 and for women 43.0 ±0.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Lewis County by age, ACS 2020–2024
Age	People	Share	Washington	United States
Under 5	4,812 ±117	5.7% ±0.1	5.5% ±<0.1	5.6% ±<0.1
5 to 17	13,611 ±585	16.0% ±0.7	15.8% ±0.1	16.3% ±<0.1
18 to 24	5,940 ±465	7.0% ±0.5	8.5% ±0.1	9.1% ±<0.1
25 to 44	20,890 ±573	24.5% ±0.7	29.5% ±0.1	26.9% ±<0.1
45 to 64	21,690 ±714	25.5% ±0.8	24.0% ±0.1	24.8% ±<0.1
65 and over	18,211 ±787	21.4% ±0.9	16.6% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $74,796 ±$3,695, and income per person $36,049 ±$1,164, in 2024 dollars. The median is $98,141 ±$414 in Washington and $80,734 ±$166 in the United States.

Households by income

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Households in Lewis County by income, ACS 2020–2024
Household income	Households	Share	Washington	United States
Under $25,000	4,831 ±505	14.7% ±1.5	11.1% ±0.2	14.6% ±<0.1
$25,000 to $49,999	6,448 ±682	19.6% ±2.1	13.2% ±0.2	16.7% ±<0.1
$50,000 to $74,999	5,218 ±537	15.9% ±1.6	14.1% ±0.2	15.5% ±<0.1
$75,000 to $99,999	4,617 ±446	14.0% ±1.3	12.4% ±0.1	12.6% ±<0.1
$100,000 to $149,999	6,358 ±553	19.3% ±1.7	19.2% ±0.2	17.5% ±<0.1
$150,000 to $199,999	2,906 ±355	8.8% ±1.1	11.4% ±0.1	9.6% ±<0.1
$200,000 or more	2,538 ±386	7.7% ±1.2	18.5% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Lewis County by age, ACS 2020–2024
Age	Below poverty	Rate	Washington	United States
All ages	10,266 ±962	12.2% ±1.1	9.9% ±0.2	12.5% ±0.1
Under 18	2,573 ±461	14.6% ±2.5	11.6% ±0.3	16.1% ±0.1
18 to 59	5,142 ±663	12.3% ±1.6	9.5% ±0.2	11.6% ±0.1
60 and over	2,551 ±470	10.4% ±1.9	9.3% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Lewis County, ACS 2020–2024
Measure	Lewis County	Washington	United States
Housing units	36,512 ±62	3,306,620 ±517	143,775,355 ±10,234
Occupied	90.2% ±1.2	92.7% ±0.2	89.9% ±0.1
Vacant	9.8% ±1.2	7.3% ±0.2	10.1% ±0.1
Owner occupied	75.8% ±1.5	63.8% ±0.3	65.2% ±0.3
Renter occupied	24.2% ±1.5	36.2% ±0.2	34.8% ±0.1
Median home value	$385,800 ±$7,962	$564,600 ±$1,940	$332,700 ±$236
Median gross rent	$1,097 ±$45	$1,760 ±$7	$1,413 ±$2
Median year built	1980 ±2	1985 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Lewis County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Washington	United States
Hispanic or Latino	9,810 ±0	11.5% ±<0.1	14.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	68,038 ±413	79.9% ±0.5	63.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	554 ±157	0.7% ±0.2	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	927 ±165	1.1% ±0.2	9.7% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	887 ±183	1.0% ±0.2	0.8% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	199 ±47	0.2% ±0.1	0.7% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	554 ±249	0.7% ±0.3	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	4,185 ±382	4.9% ±0.4	6.8% ±0.1	4.3% ±<0.1

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Lewis County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Washington	United States
Born in the state	52,273 ±1,302	61.4% ±1.5	46.4% ±0.2	57.3% ±<0.1
Born in another state	27,300 ±1,343	32.1% ±1.6	36.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	1,055 ±249	1.2% ±0.3	1.9% ±<0.1	1.7% ±<0.1
Born abroad	4,526 ±446	5.3% ±0.5	15.4% ±0.1	14.1% ±<0.1
Naturalized citizens	2,031 ±307	2.4% ±0.4	7.5% ±0.1	7.4% ±<0.1
Not citizens	2,495 ±453	2.9% ±0.5	7.9% ±0.1	6.8% ±<0.1

Lewis County among the counties of Washington

15th of 39 by population, July 2025. Every one is listed on the Washington page.

Counties of Washington near Lewis County in population, July 2025
County	July 2025	Change since 2020
Benton County	221,722	+6.9%
Skagit County	132,975	+2.4%
Cowlitz County	114,885	+3.5%
Grant County	105,727	+6.3%
Franklin County	102,612	+5.6%
Lewis County	88,062	+6.7%
Island County	85,657	−1.5%
Chelan County	81,941	+3.3%
Clallam County	78,202	+1.1%
Grays Harbor County	78,144	+3.0%
Mason County	71,165	+7.8%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026