Martin County, Indiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 88th-largest in Indiana
The population of Martin County, Indiana is 9,854 as of the 2023 American Community Survey, making it the 88th-largest county in Indiana. The median household income is $65,345, the median home value is $150,400, and the median age is 41.8.
The population of Martin County has declined 4.8% since 2010 (10,361 → 9,864), a -0.35% annualized rate.
9,854
Population
-0.35%
Annual growth
29
People / sq mi
$65,345
Median Income
$150,400
Median Home Value
Martin County covers 336 sq mi of land at 29.3 people per square mile.
About Martin County, IN
Martin County is defined demographically by education — 13.2% of adults hold a bachelor’s degree, below the national average. With 9,854 residents, Martin County is a county in Indiana.
Median household income is $65,345, below the US median of $78,538. About 9.6% of residents live below the federal poverty level, below the national 12.4%. Homes carry a median value of $150,400, with typical rent around $643.
Four-year-degree attainment is near the bottom of the range for US counties, 13.2%, below the national 35.0%. Around 8.8% of workers work from home, below the national 14.0%, and the average commute runs about 30 minutes each way.
Martin County Population History (2010-2024)
The county of Martin County had a population of 10,361 in 2010 and 9,864 in 2024, a -4.8% growth over 14 years. The peak was 10,361 in 2010. Average annual growth rate: -0.35%.
9,864
Population (2024)
10,361
Population (2010)
10,361
Peak (2010)
-0.35%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 10,361 |
| 2011 | 10,339 |
| 2012 | 10,322 |
| 2013 | 10,238 |
| 2014 | 10,245 |
| 2015 | 10,222 |
| 2016 | 10,195 |
| 2017 | 10,188 |
| 2018 | 10,204 |
| 2019 | 10,179 |
| 2020 | 9,810 |
| 2021 | 9,807 |
| 2022 | 9,808 |
| 2023 | 9,862 |
| 2024 | 9,864 |
Race & Ethnicity
| White | 95.7% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Age & Sex
41.8
Median Age
48.5%
Female
51.5%
Male
20.5%
Age 65+
Age Distribution
Children (under 15): 18.2% · Seniors (65+): 20.5%
Income & Poverty
| Median household income | $65,345$-4,706 vs state |
| Mean household income | $80,001 |
| Per-capita income | $32,250 |
| Poverty rate | 9.6%+1.2% vs state |
| Unemployment rate | 1.3% |
| Employment-to-population | 60.3% |
Top Industries by Employment
The largest employment sector in Martin County is manufacturing, accounting for 19.0% of workers.
How residents commute
0.0%
Drive alone
0.8%
Carpool
79.7%
Public transit
8.8%
Work from home
29.6 min
Avg commute
Housing
$150,400$-51,200 vs state
Median home value
$643
Median rent
78.2%
Homeownership rate
4,583
Total housing units
85.7%
Occupied
14.3%
Vacant
21.8%
Renter-occupied
Social & access
92.9%
With health insurance
91.8%
With broadband internet
12.8%
Foreign-born
10.6%
Veterans (18+)
17.0%
With a disability
98.5%
Speak language other than English at home
Education
88.7%
High School+
13.2%
Bachelor's+
Largest cities in Indiana
Other counties in Indiana
Part of Indiana
Metro areas in Indiana
County rankings
Frequently Asked Questions
Martin County, Indiana has a population of 9,854 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 88th-largest county in Indiana. Population density is 29 people per square mile.
The population of Martin County has declined 4.8% since 2010 (10,361 → 9,864), a -0.35% annualized rate.
The median household income in Martin County, Indiana is $65,345, with mean (average) household income of $80,001 and per-capita income of $32,250. 9.6% of residents live below the federal poverty level.
In Martin County, the largest racial and ethnic groups are White (95.7%), Hispanic or Latino (0.8%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Martin County, Indiana is 41.8 years. Residents are 48.5% female and 51.5% male.
The median home value in Martin County is $150,400 and median monthly rent is $643. 78.2% of occupied housing units are owner-occupied. The county has 4,583 total housing units, 14.3% of which are vacant.
The largest employment sector in Martin County, Indiana is manufacturing, employing 19.0% of workers. The unemployment rate is 1.3%.
Indianapolis is among the largest cities associated with Martin County, Indiana, with a population of 882,043.
Martin County, IN Climate
Martin County, IN has an average annual temperature of 12.2°C (54°F) and receives about 1183 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.2°C
Avg Temp
1183
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 72 mm |
| February | 1° / 33° | 71 mm |
| March | 7° / 44° | 110 mm |
| April | 12° / 54° | 109 mm |
| May | 17° / 63° | 130 mm |
| June | 22° / 72° | 103 mm |
| July | 24° / 76° | 123 mm |
| August | 24° / 74° | 98 mm |
| September | 20° / 68° | 84 mm |
| October | 13° / 56° | 85 mm |
| November | 7° / 45° | 110 mm |
| December | 1° / 35° | 88 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Martin County, IN
The most comfortable months to visit Martin County, IN are typically September, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -7°C low). May is usually the wettest month.
Where to stay near Martin County
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Population, race, income, age, and trends across Indiana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.