Martin County, Minnesota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 49th-largest in Minnesota
The population of Martin County, Minnesota is 19,864 as of the 2023 American Community Survey, making it the 49th-largest county in Minnesota. The median household income is $62,969, the median home value is $158,800, and the median age is 44.5.
The population of Martin County has declined 6.0% since 2010 (20,805 → 19,561), a -0.44% annualized rate.
19,864
Population
-0.44%
Annual growth
28
People / sq mi
$62,969
Median Income
$158,800
Median Home Value
Martin County covers 712 sq mi of land at 27.9 people per square mile.
About Martin County, MN
Age is the most distinctive thing about Martin County: a median age of 44.5, older than the national median. With 19,864 residents, Martin County is a county in Minnesota. It ranks #49 among counties in Minnesota by population.
The typical household here earns about $62,969, below the US median of $78,538. Poverty is relatively low for US counties at 6.5%, below the national 12.4%. Median home value is $158,800, with typical rent around $735.
Degree attainment is mid-range for US counties: 23.8% of adults hold a four-year degree, below the national 35.0%. Around 7.8% of workers work from home, below the national 14.0%, and the average commute runs about 18 minutes each way.
The age structure shapes everything downstream in Martin County — from housing demand to the mix of working-age earners reflected in the income figures above.
Martin County Population History (2010-2024)
The county of Martin County had a population of 20,805 in 2010 and 19,561 in 2024, a -6.0% growth over 14 years. The peak was 20,805 in 2010. Average annual growth rate: -0.44%.
19,561
Population (2024)
20,805
Population (2010)
20,805
Peak (2010)
-0.44%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 20,805 |
| 2011 | 20,627 |
| 2012 | 20,461 |
| 2013 | 20,424 |
| 2014 | 20,247 |
| 2015 | 20,041 |
| 2016 | 19,920 |
| 2017 | 19,867 |
| 2018 | 19,772 |
| 2019 | 19,641 |
| 2020 | 19,993 |
| 2021 | 19,933 |
| 2022 | 19,687 |
| 2023 | 19,728 |
| 2024 | 19,561 |
Race & Ethnicity
| White | 93.1% |
| Black or African American | 0.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
44.5
Median Age
49.5%
Female
50.5%
Male
24.0%
Age 65+
Age Distribution
Children (under 15): 18.5% · Seniors (65+): 24.0%
Income & Poverty
| Median household income | $62,969$-24,587 vs state |
| Mean household income | $84,513 |
| Per-capita income | $37,466 |
| Poverty rate | 6.5%+1.0% vs state |
| Unemployment rate | 2.8% |
| Employment-to-population | 61.8% |
Top Industries by Employment
The largest employment sector in Martin County is professional & business services, accounting for 24.0% of workers.
How residents commute
0.1%
Drive alone
4.1%
Carpool
80.9%
Public transit
7.8%
Work from home
17.6 min
Avg commute
Housing
$158,800$-146,700 vs state
Median home value
$735
Median rent
72.4%
Homeownership rate
9,715
Total housing units
91.0%
Occupied
9.0%
Vacant
27.6%
Renter-occupied
Social & access
95.5%
With health insurance
92.1%
With broadband internet
19.8%
Foreign-born
8.8%
Veterans (18+)
16.5%
With a disability
94.3%
Speak language other than English at home
Education
94.7%
High School+
23.8%
Bachelor's+
Largest cities in Minnesota
Other counties in Minnesota
Part of Minnesota
Metro areas in Minnesota
County rankings
Frequently Asked Questions
Martin County, Minnesota has a population of 19,864 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 49th-largest county in Minnesota. Population density is 28 people per square mile.
The population of Martin County has declined 6.0% since 2010 (20,805 → 19,561), a -0.44% annualized rate.
The median household income in Martin County, Minnesota is $62,969, with mean (average) household income of $84,513 and per-capita income of $37,466. 6.5% of residents live below the federal poverty level.
In Martin County, the largest racial and ethnic groups are White (93.1%), Hispanic or Latino (0.9%), Black or African American (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Martin County, Minnesota is 44.5 years. Residents are 49.5% female and 50.5% male.
The median home value in Martin County is $158,800 and median monthly rent is $735. 72.4% of occupied housing units are owner-occupied. The county has 9,715 total housing units, 9.0% of which are vacant.
The largest employment sector in Martin County, Minnesota is professional, scientific, and management services, employing 24.0% of workers. The unemployment rate is 2.8%.
Minneapolis is among the largest cities associated with Martin County, Minnesota, with a population of 426,845.
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Statewide data for Minnesota
Population, race, income, age, and trends across Minnesota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.