Demographics of Marion County, Missouri

Marion County, Missouri had 28,525 people on July 1, 2025, by the Census Bureau’s estimate: +45 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

28,525
Population: July 1, 2025, Vintage 2025 estimate.; +0.2%
Change since July 2020: +45 people.; 39.6 ±0.8
Median age: ACS 2020–⁠2024.; $62,903 ±$2,753
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, Missouri's population grew 0.2% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Marion County, Missouri'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, Missouri's population grew 0.2% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Marion County, Missouri'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	28,480	100.0	100.0
2021	28,556	100.3	100.2
2022	28,472	100.0	100.7
2023	28,270	99.3	101.6
2024	28,408	99.7	102.5
2025	28,525	100.2	103.1

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Population of Marion County, Missouri on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	28,480	−46	−10	0	−36
2021	28,556	+76	−31	+7	+75
2022	28,472	−84	−100	+22	+15
2023	28,270	−202	−89	+12	−118
2024	28,408	+138	−41	+12	+171
2025	28,525	+117	−16	+5	+127

Age, 2020–2024

The median age is 39.6 ±0.8: for men 38.3 ±0.7 and for women 40.4 ±0.5. 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	Missouri	United States
Under 5	2,013 ±209	7.1% ±0.7	5.8% ±<0.1	5.6% ±<0.1
5 to 17	4,821 ±392	16.9% ±1.4	16.6% ±0.1	16.3% ±<0.1
18 to 24	2,503 ±240	8.8% ±0.8	9.1% ±0.1	9.1% ±<0.1
25 to 44	6,789 ±342	23.9% ±1.2	26.0% ±0.1	26.9% ±<0.1
45 to 64	6,925 ±341	24.3% ±1.2	24.6% ±0.1	24.8% ±<0.1
65 and over	5,406 ±388	19.0% ±1.4	17.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $62,903 ±$2,753, and income per person $30,271 ±$1,403, in 2024 dollars. The median is $70,702 ±$325 in Missouri 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	Missouri	United States
Under $25,000	2,249 ±318	19.9% ±2.8	15.8% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,154 ±316	19.0% ±2.8	19.6% ±0.2	16.7% ±<0.1
$50,000 to $74,999	2,367 ±309	20.9% ±2.7	17.4% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,743 ±269	15.4% ±2.3	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	1,686 ±234	14.9% ±2.0	17.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	744 ±217	6.6% ±1.9	8.2% ±0.1	9.6% ±<0.1
$200,000 or more	380 ±108	3.4% ±1.0	8.7% ±0.1	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	Missouri	United States
All ages	3,907 ±626	14.2% ±2.3	12.6% ±0.2	12.5% ±0.1
Under 18	988 ±296	14.7% ±4.2	15.8% ±0.4	16.1% ±0.1
18 to 59	2,045 ±330	15.0% ±2.4	12.0% ±0.2	11.6% ±0.1
60 and over	874 ±195	12.2% ±2.6	10.9% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Marion County, ACS 2020–2024
Measure	Marion County	Missouri	United States
Housing units	12,917 ±39	2,825,287 ±1,043	143,775,355 ±10,234
Occupied	87.7% ±2.1	88.8% ±0.2	89.9% ±0.1
Vacant	12.3% ±2.0	11.2% ±0.2	10.1% ±0.1
Owner occupied	69.3% ±2.9	68.1% ±0.3	65.2% ±0.3
Renter occupied	30.7% ±3.1	31.9% ±0.2	34.8% ±0.1
Median home value	$162,000 ±$7,169	$230,300 ±$880	$332,700 ±$236
Median gross rent	$808 ±$47	$1,033 ±$6	$1,413 ±$2
Median year built	1971 ±2	1978 ±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	Missouri	United States
Hispanic or Latino	582 ±0	2.0% ±<0.1	5.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	25,330 ±115	89.0% ±0.4	76.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	1,192 ±180	4.2% ±0.6	10.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	228 ±80	0.8% ±0.3	2.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	22 to 114	0.1% to 0.4%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 23	0% to 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	2 to 138	< 0.1% to 0.5%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	987 ±236	3.5% ±0.8	4.8% ±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 Marion County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Missouri	United States
Born in the state	19,186 ±718	67.4% ±2.5	65.6% ±0.2	57.3% ±<0.1
Born in another state	9,032 ±668	31.7% ±2.3	29.1% ±0.1	26.9% ±<0.1
Born a citizen outside the states	7 to 145	< 0.1% to 0.5%	0.8% ±<0.1	1.7% ±<0.1
Born abroad	58 to 268	0.2% to 0.9%	4.5% ±0.1	14.1% ±<0.1
Naturalized citizens	0 to 129	0% to 0.5%	2.3% ±0.1	7.4% ±<0.1
Not citizens	31 to 181	0.1% to 0.6%	2.2% ±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%.

Marion County among the counties of Missouri

38th of 115 by population, July 2025. Every one is listed on the Missouri page.

Counties of Missouri near Marion County in population, July 2025
County	July 2025	Change since 2020
Laclede County	36,943	+2.5%
Barry County	36,200	+4.8%
Polk County	33,604	+6.3%
Lafayette County	33,531	+1.4%
Stone County	32,503	+4.1%
Marion County	28,525	+0.2%
Stoddard County	28,284	−1.3%
Dunklin County	26,855	−4.8%
Texas County	25,994	+6.9%
Miller County	25,817	+4.2%
Adair County	25,684	+1.6%

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