Demographics of Martin County, Minnesota

Martin County, Minnesota had 19,440 people on July 1, 2025, by the Census Bureau’s estimate: −558 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.

Martin County, in four figures

19,440
Population: July 1, 2025, Vintage 2025 estimate.; −2.8%
Change since July 2020: −558 people.; 43.9 ±0.3
Median age: ACS 2020–⁠2024.; $59,507 ±$3,542
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.

Martin County, Minnesota's population shrank 2.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Martin County, Minnesota'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

Martin County, Minnesota's population shrank 2.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Martin County, Minnesota'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	19,998	100.0	100.0
2021	19,941	99.7	100.2
2022	19,696	98.5	100.7
2023	19,727	98.6	101.6
2024	19,564	97.8	102.5
2025	19,440	97.2	103.1

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Population of Martin County, Minnesota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	19,998	−40	−2	0	−34
2021	19,941	−57	−45	0	−27
2022	19,696	−245	−84	+23	−187
2023	19,727	+31	−61	+28	+69
2024	19,564	−163	−69	+38	−129
2025	19,440	−124	−75	+12	−60

Age, 2020–2024

The median age is 43.9 ±0.3: for men 44.0 ±0.7 and for women 43.8 ±0.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Martin County by age, ACS 2020–2024
Age	People	Share	Minnesota	United States
Under 5	1,112 ±69	5.6% ±0.3	5.8% ±<0.1	5.6% ±<0.1
5 to 17	3,403 ±194	17.2% ±1.0	17.0% ±0.1	16.3% ±<0.1
18 to 24	1,261 ±154	6.4% ±0.8	8.8% ±0.1	9.1% ±<0.1
25 to 44	4,281 ±215	21.6% ±1.1	26.6% ±0.1	26.9% ±<0.1
45 to 64	4,857 ±236	24.6% ±1.2	24.5% ±0.1	24.8% ±<0.1
65 and over	4,866 ±334	24.6% ±1.7	17.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $59,507 ±$3,542, and income per person $37,332 ±$2,107, in 2024 dollars. The median is $89,062 ±$409 in Minnesota and $80,734 ±$166 in the United States.

Households by income

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Households in Martin County by income, ACS 2020–2024
Household income	Households	Share	Minnesota	United States
Under $25,000	1,550 ±240	17.5% ±2.7	11.7% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,155 ±319	24.4% ±3.5	14.9% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,483 ±209	16.8% ±2.3	15.6% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,146 ±150	13.0% ±1.7	13.2% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,490 ±201	16.9% ±2.2	19.6% ±0.2	17.5% ±<0.1
$150,000 to $199,999	520 ±95	5.9% ±1.1	11.2% ±0.2	9.6% ±<0.1
$200,000 or more	495 ±104	5.6% ±1.2	13.8% ±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 Martin County by age, ACS 2020–2024
Age	Below poverty	Rate	Minnesota	United States
All ages	2,564 ±517	13.1% ±2.6	9.3% ±0.2	12.5% ±0.1
Under 18	620 ±183	13.9% ±4.0	10.3% ±0.3	16.1% ±0.1
18 to 59	1,041 ±234	11.9% ±2.6	9.1% ±0.2	11.6% ±0.1
60 and over	903 ±209	14.3% ±3.2	8.7% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Martin County, ACS 2020–2024
Measure	Martin County	Minnesota	United States
Housing units	9,729 ±69	2,545,030 ±1,535	143,775,355 ±10,234
Occupied	90.9% ±2.5	90.7% ±0.2	89.9% ±0.1
Vacant	9.1% ±2.4	9.3% ±0.2	10.1% ±0.1
Owner occupied	68.9% ±2.8	72.2% ±0.3	65.2% ±0.3
Renter occupied	31.1% ±3.5	27.8% ±0.2	34.8% ±0.1
Median home value	$163,500 ±$7,281	$329,300 ±$903	$332,700 ±$236
Median gross rent	$761 ±$61	$1,280 ±$7	$1,413 ±$2
Median year built	1960 ±3	1979 ±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 Martin County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Minnesota	United States
Hispanic or Latino	1,421 ±0	7.2% ±<0.1	6.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	17,437 ±183	88.2% ±0.9	75.9% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	169 ±37	0.9% ±0.2	6.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	101 ±27	0.5% ±0.1	5.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	2 to 32	< 0.1% to 0.2%	0.7% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 16	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	42 to 406	0.2% to 2.1%	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	411 ±86	2.1% ±0.4	4.5% ±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 Martin County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Minnesota	United States
Born in the state	14,945 ±367	75.6% ±1.9	67.1% ±0.2	57.3% ±<0.1
Born in another state	4,124 ±355	20.8% ±1.8	23.4% ±0.1	26.9% ±<0.1
Born a citizen outside the states	222 ±88	1.1% ±0.4	0.9% ±<0.1	1.7% ±<0.1
Born abroad	489 ±106	2.5% ±0.5	8.7% ±0.1	14.1% ±<0.1
Naturalized citizens	173 ±72	0.9% ±0.4	5.1% ±0.1	7.4% ±<0.1
Not citizens	316 ±90	1.6% ±0.5	3.6% ±0.1	6.8% ±<0.1

Martin County among the counties of Minnesota

49th of 87 by population, July 2025. Every one is listed on the Minnesota page.

Counties of Minnesota near Martin County in population, July 2025
County	July 2025	Change since 2020
Hubbard County	22,369	+4.6%
Nobles County	22,338	+0.6%
Fillmore County	21,540	+1.4%
Wabasha County	21,537	+0.7%
Dodge County	21,376	+2.3%
Martin County	19,440	−2.8%
Waseca County	18,688	−1.5%
Houston County	18,400	−2.4%
Kanabec County	16,628	+3.6%
Aitkin County	16,252	+3.5%
Sibley County	15,356	+3.6%

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