Demographics of Columbia County, Washington

Columbia County, Washington had 4,141 people on July 1, 2025, by the Census Bureau’s estimate: +187 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.

Columbia County, in four figures

4,141
Population: July 1, 2025, Vintage 2025 estimate.; +4.7%
Change since July 2020: +187 people.; 49.6 ±1.8
Median age: ACS 2020–⁠2024.; $71,810 ±$5,338
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.

Columbia County, Washington's population grew 4.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Columbia 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).

Source: The Census Bureau

About this chart

The figures

Columbia County, Washington's population grew 4.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Columbia 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	3,954	100.0	100.0
2021	4,021	101.7	100.2
2022	4,021	101.7	100.7
2023	4,064	102.8	101.6
2024	4,046	102.3	102.5
2025	4,141	104.7	103.1

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Population of Columbia 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	3,954	−2	−10	0	+9
2021	4,021	+67	−31	+1	+103
2022	4,021	0	−47	+1	+43
2023	4,064	+43	−18	+6	+54
2024	4,046	−18	−15	+17	−20
2025	4,141	+95	−16	+16	+96

Age, 2020–2024

The median age is 49.6 ±1.8: for men 44.9 ±3.9 and for women 52.4 ±3.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Columbia County by age, ACS 2020–2024
Age	People	Share	Washington	United States
Under 5	162 ±62	4.0% ±1.5	5.5% ±<0.1	5.6% ±<0.1
5 to 17	561 ±125	14.0% ±3.1	15.8% ±0.1	16.3% ±<0.1
18 to 24	233 ±85	5.8% ±2.1	8.5% ±0.1	9.1% ±<0.1
25 to 44	905 ±153	22.5% ±3.8	29.5% ±0.1	26.9% ±<0.1
45 to 64	976 ±117	24.3% ±2.9	24.0% ±0.1	24.8% ±<0.1
65 and over	1,177 ±142	29.3% ±3.5	16.6% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $71,810 ±$5,338, and income per person $40,579 ±$5,222, 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 Columbia County by income, ACS 2020–2024
Household income	Households	Share	Washington	United States
Under $25,000	353 ±107	19.0% ±5.6	11.1% ±0.2	14.6% ±<0.1
$25,000 to $49,999	279 ±81	15.0% ±4.2	13.2% ±0.2	16.7% ±<0.1
$50,000 to $74,999	371 ±114	19.9% ±5.9	14.1% ±0.2	15.5% ±<0.1
$75,000 to $99,999	205 ±64	11.0% ±3.3	12.4% ±0.1	12.6% ±<0.1
$100,000 to $149,999	454 ±120	24.4% ±6.2	19.2% ±0.2	17.5% ±<0.1
$150,000 to $199,999	50 to 150	2.7% to 8.0%	11.4% ±0.1	9.6% ±<0.1
$200,000 or more	48 to 152	2.6% to 8.1%	18.5% ±0.2	13.4% ±0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

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 Columbia County by age, ACS 2020–2024
Age	Below poverty	Rate	Washington	United States
All ages	370 ±118	9.3% ±3.0	9.9% ±0.2	12.5% ±0.1
Under 18	0 to 44	0% to 6.2%	11.6% ±0.3	16.1% ±0.1
18 to 59	216 ±99	11.8% ±5.3	9.5% ±0.2	11.6% ±0.1
60 and over	136 ±61	9.5% ±4.2	9.3% ±0.2	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Columbia County, ACS 2020–2024
Measure	Columbia County	Washington	United States
Housing units	2,217 ±13	3,306,620 ±517	143,775,355 ±10,234
Occupied	84.0% ±6.1	92.7% ±0.2	89.9% ±0.1
Vacant	16.0% ±6.1	7.3% ±0.2	10.1% ±0.1
Owner occupied	77.7% ±3.7	63.8% ±0.3	65.2% ±0.3
Renter occupied	22.3% ±6.6	36.2% ±0.2	34.8% ±0.1
Median home value	$271,200 ±$29,295	$564,600 ±$1,940	$332,700 ±$236
Median gross rent	$985 ±$65	$1,760 ±$7	$1,413 ±$2
Median year built	1953 ±6	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 Columbia County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Washington	United States
Hispanic or Latino	335 ±0	8.3% ±<0.1	14.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	3,261 ±61	81.2% ±1.5	63.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 53	0% to 1.3%	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 174	0% to 4.3%	9.7% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 34	0% to 0.8%	0.8% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 13	0% to 0.3%	0.7% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 21	0% to 0.5%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	300 ±115	7.5% ±2.9	6.8% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

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 Columbia County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Washington	United States
Born in the state	2,479 ±164	61.8% ±4.1	46.4% ±0.2	57.3% ±<0.1
Born in another state	1,308 ±177	32.6% ±4.4	36.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	0 to 55	0% to 1.4%	1.9% ±<0.1	1.7% ±<0.1
Born abroad	77 to 325	1.9% to 8.1%	15.4% ±0.1	14.1% ±<0.1
Naturalized citizens	3 to 67	0.1% to 1.7%	7.5% ±0.1	7.4% ±<0.1
Not citizens	40 to 292	1.0% to 7.3%	7.9% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Columbia County among the counties of Washington

38th of 39 by population, July 2025. Every one is listed on the Washington page.

Counties of Washington near Columbia County in population, July 2025
County	July 2025	Change since 2020
Pend Oreille County	14,457	+7.0%
Skamania County	12,669	+5.2%
Lincoln County	11,982	+9.7%
Ferry County	7,517	+4.4%
Wahkiakum County	4,873	+9.6%
Columbia County	4,141	+4.7%
Garfield County	2,416	+5.2%

Elsewhere on the site

Rankings this appears in

No. 17 Counties by population growth in Washington
No. 38 Counties by population in Washington
No. 113 Counties by median age

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

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026