Demographics of Marion County, Oregon

Marion County, Oregon had 355,777 people on July 1, 2025, by the Census Bureau’s estimate: +9,493 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.

Marion County, in four figures

355,777
Population: July 1, 2025, Vintage 2025 estimate.; +2.7%
Change since July 2020: +9,493 people.; 37.5 ±0.2
Median age: ACS 2020–⁠2024.; $77,351 ±$1,920
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.

Marion County, Oregon's population grew 2.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Marion County, Oregon'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

Marion County, Oregon's population grew 2.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Marion County, Oregon'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	346,284	100.0	100.0
2021	347,887	100.5	100.2
2022	348,364	100.6	100.7
2023	349,966	101.1	101.6
2024	353,218	102.0	102.5
2025	355,777	102.7	103.1

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Population of Marion County, Oregon on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	346,284	+358	+154	+9	+76
2021	347,887	+1,603	+668	+130	+495
2022	348,364	+477	+317	+522	−108
2023	349,966	+1,602	+534	+2,073	−912
2024	353,218	+3,252	+622	+2,982	−323
2025	355,777	+2,559	+605	+1,285	+644

Age, 2020–2024

The median age is 37.5 ±0.2: for men 36.5 ±0.2 and for women 38.5 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Marion County by age, ACS 2020–2024
Age	People	Share	Oregon	United States
Under 5	20,488 ±110	5.9% ±<0.1	4.9% ±<0.1	5.6% ±<0.1
5 to 17	61,708 ±1,462	17.7% ±0.4	15.0% ±0.1	16.3% ±<0.1
18 to 24	32,374 ±983	9.3% ±0.3	8.5% ±0.1	9.1% ±<0.1
25 to 44	95,623 ±1,595	27.4% ±0.5	28.0% ±0.1	26.9% ±<0.1
45 to 64	80,673 ±1,434	23.1% ±0.4	24.5% ±0.1	24.8% ±<0.1
65 and over	58,378 ±1,583	16.7% ±0.5	19.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $77,351 ±$1,920, and income per person $37,306 ±$918, in 2024 dollars. The median is $83,011 ±$573 in Oregon and $80,734 ±$166 in the United States.

Households by income

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Households in Marion County by income, ACS 2020–2024
Household income	Households	Share	Oregon	United States
Under $25,000	16,933 ±1,198	13.3% ±0.9	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	21,942 ±1,272	17.3% ±1.0	16.2% ±0.3	16.7% ±<0.1
$50,000 to $74,999	22,780 ±1,308	18.0% ±1.0	15.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	17,487 ±994	13.8% ±0.8	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	24,654 ±1,227	19.4% ±1.0	18.5% ±0.2	17.5% ±<0.1
$150,000 to $199,999	11,361 ±863	9.0% ±0.7	10.1% ±0.2	9.6% ±<0.1
$200,000 or more	11,713 ±793	9.2% ±0.6	12.7% ±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 Marion County by age, ACS 2020–2024
Age	Below poverty	Rate	Oregon	United States
All ages	44,229 ±2,738	13.0% ±0.8	11.9% ±0.2	12.5% ±0.1
Under 18	13,518 ±1,234	16.8% ±1.5	13.2% ±0.4	16.1% ±0.1
18 to 59	22,385 ±1,551	12.3% ±0.8	12.0% ±0.2	11.6% ±0.1
60 and over	8,326 ±898	10.8% ±1.1	10.8% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Marion County, ACS 2020–2024
Measure	Marion County	Oregon	United States
Housing units	132,295 ±116	1,857,992 ±637	143,775,355 ±10,234
Occupied	95.9% ±0.5	92.5% ±0.2	89.9% ±0.1
Vacant	4.1% ±0.5	7.5% ±0.2	10.1% ±0.1
Owner occupied	62.3% ±1.2	63.3% ±0.4	65.2% ±0.3
Renter occupied	37.7% ±1.1	36.7% ±0.3	34.8% ±0.1
Median home value	$416,400 ±$4,764	$477,600 ±$1,400	$332,700 ±$236
Median gross rent	$1,414 ±$20	$1,525 ±$10	$1,413 ±$2
Median year built	1979 ±1	1981 ±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 Marion County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Oregon	United States
Hispanic or Latino	101,164 ±0	29.0% ±<0.1	14.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	211,930 ±809	60.7% ±0.2	71.4% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	4,094 ±492	1.2% ±0.1	1.8% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	6,882 ±699	2.0% ±0.2	4.4% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1,885 ±463	0.5% ±0.1	0.6% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	3,702 ±319	1.1% ±0.1	0.4% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	1,848 ±531	0.5% ±0.2	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	17,739 ±1,453	5.1% ±0.4	6.1% ±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 Marion County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Oregon	United States
Born in the state	182,073 ±2,974	52.1% ±0.9	45.6% ±0.2	57.3% ±<0.1
Born in another state	114,238 ±2,885	32.7% ±0.8	43.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	5,083 ±612	1.5% ±0.2	1.3% ±0.1	1.7% ±<0.1
Born abroad	47,850 ±2,165	13.7% ±0.6	9.8% ±0.2	14.1% ±<0.1
Naturalized citizens	17,887 ±1,440	5.1% ±0.4	4.9% ±0.1	7.4% ±<0.1
Not citizens	29,963 ±1,687	8.6% ±0.5	5.0% ±0.1	6.8% ±<0.1

Marion County among the counties of Oregon

5th of 36 by population, July 2025. Every one is listed on the Oregon page.

Counties of Oregon near Marion County in population, July 2025
County	July 2025	Change since 2020
Multnomah County	795,391	−2.6%
Washington County	611,708	+1.8%
Clackamas County	426,280	+0.9%
Lane County	381,584	−0.7%
Marion County	355,777	+2.7%
Jackson County	221,795	−0.9%
Deschutes County	213,072	+6.8%
Linn County	132,843	+3.0%
Douglas County	111,951	+0.6%
Yamhill County	110,024	+2.2%

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